NCERT Exemplar Class 7 Maths Chapter 2 Fractions and Decimals are part of NCERT Exemplar Class 7 Maths. Here we have given NCERT Exemplar Class 7 Maths Solutions Chapter 2 Fractions and Decimals.

## NCERT Exemplar Class 7 Maths Solutions Chapter 2 Fractions and Decimals

**Directions: In questions 1 to 20, out of four options, only one is correct. Write the correct answer.**

Question 1.

is equal to

Solution:

(b)

Question 2.

is equal to

Solution:

(c)

Question 3.

A ribbon of length m is cut into small pieces each of length m. Number of pieces will be:

(a) 5

(b) 6

(c) 7

(d) 8

Solution:

Question 4.

The ascending arrangement of is:

Solution:

(b) The given numbers are

LCM of denominators, i.e., 3, 7, 21 is 21.

Question 5.

Reciprocal of the fraction is:

(a) 2

(b) 3

(c)

(d)

Solution:

(d) Reciprocal of the fraction

Question 6.

The product of and 4 is:

Solution:

(a)

Question 7.

The product of 3 and is:

Solution:

(c)

Question 8.

Pictorial representation of is;

Solution:

(b)

Hence, pictorial representation is

Question 9.

is equal to:

Solution:

(d)

Question 10.

The product of 0.03 × 0.9 is:

(a) 2.7

(b) 0.27

(c) 0.027

(d) 0.0027

Solution:

(c)

Question 11.

is equal to:

Solution:

(b)

Question 12.

is equal to:

Solution:

(d)

Question 13.

Which of the following represents

Solution:

(c)

Question 14.

is equal to

Solution:

(d)

Question 15.

One packet of biscuits requires cups of flour and cups of sugar. Estimated total quantity of both ingredients used in 10 such packets of biscuits will be

(a) less than 30 cups

(b) between 30 cups and 40 cups

(c) between 40 cups and 50 cups

(d) above 50 cups

Solution:

(c) : The requirement of flour and sugar for one packet of biscuits

∴ The requirement of both ingredients for 10 packets

i.e., between 40 cups and 50 cups

Question 16.

The product of 7 and is:

Solution:

(b)

Question 17.

On dividing 7 by , the result is

Solution:

(d)

Question 18.

is eQuestionual to

Solution:

(a)

Question 19.

of 5 kg apples were used on Monday. The next day of what was left was used. Weight (in kg) of apples left now is

Solution:

(c): Weight of apples used on Monday

Weight of apples left on next day = (5 – 4) kg

= – 1 kg

Weight of apples used on next day

∴ Weight of apples left now

Question 20.

The picture

interprets

Solution:

**Directions: In questions 21 to 44, fill in the blanks to make the statements true.**

Question 21.

Rani ate part of a cake while her brother Ravi ate of the remaining. Part of the cake left is _________

Solution:

Let whole part of the cake is 1.

Part of the cake Rani ate of 1 i.e.,

∴ Part of the cake left

Now, part of the cake Ravi ate

Thus, part of the cake left

Question 22.

The reciprocal of is _____

Solution:

Reciprocal of is

Question 23.

of 27 is

Solution:

Question 24.

of 45 is _____

Solution:

Question 25.

is equal to

Solution:

Question 26.

is ______

Solution:

Question 27

is _____

Solution:

Question 28.

The lowest form of the product is _______

Solution:

Question 29.

is equal to _____

Solution:

Question 30.

is ____

Solution:

Question 31.

Solution:

Question 32.

3.2 × 10 = ______

Solution:

Question 33.

25.4 × 1000 = _____

Solution:

= 25400

Question 34.

93.5 × 100 = _____

Solution:

Question 35.

4.7 ÷ 10 = _____

Solution:

Question 36.

4.7 ÷ 100 = ______

Solution:

Question 37.

4.7 ÷ 1000 = ____

Solution:

Question 38.

The product of two proper fractions is _____than each of the fractions that are multiplied.

Solution:

Less

Question 39.

While dividing a fraction by another fraction, we _____ the first fraction by the _______ of the other fraction.

Solution:

Multiply, reciprocal

Question 40.

8.4 ÷ = 2.1

Solution:

4: Let x be the required number.

∴ 8.4 ÷ x = 2.1

Question 41.

52.7 ÷ _____ = 0.527

Solution:

100: Let x be the required number.

∴ 52.7 ÷ x = 0.527

Question 42.

0.5 ___ 0.7 = 0.35

Solution:

Question 43.

2 _____

Solution:

Question 44.

2.001 ÷ 0.003 = ______

Solution:

**Directions: In each of the questions 45 to 54, state whether the statement is True or False.**

Question 45.

The reciprocal of a proper fraction is a proper fraction.

Solution:

False

The reciprocal of a proper fraction is an improper fraction.

Question 46.

The reciprocal of an improper fraction is an improper fraction.

Solution:

False

The reciprocal of an improper fraction is a proper fraction.

Question 47.

Solution:

False

Question 48.

The product of two improper fractions is less than both the fractions.

Solution:

False

The product of two improper fractions is greater than both the fractions.

Question 49.

A reciprocal of a fraction is obtained by inverting it upside down.

Solution:

True

Question 50.

To multiply a decimal number by 1000, we move the decimal point in the number to the right by three places.

Solution:

True

Question 51.

To divide a decimal number by 100, we move the decimal point in the number to the left by two places.

Solution:

True

Question 52.

1 is the only number which is its own reciprocal.

Solution:

True

Question 53.

of 8 is same as .

Solution:

False

Question 54.

The reciprocal of is

Solution:

False

The reciprocal of is a

Question 55.

If 5 is added to both the numerator and the denominator of the fraction , will the value of the fraction be changed? If so, will the value increase or decrease?

Solution:

We have,

Here,

Yes, the value of the fraction is changed.

Since, 9 > 7 :

Hence, the value is increased.

Question 56.

What happens to the value of a fraction if the denominator of the fraction is decreased while the numerator is kept unchanged?

Solution:

The value of a fraction will increase if the denominator of the fraction is decreased while the numerator is kept unchanged.

Question 57.

Which letter comes of the way among A and J ?

Solution:

Total letters from A to , are 10 and

Now, D comes at 4th position.

∴ D comes at i.e., of the way among A and J.

Question 58.

If of a number is 10, then what is 1.75 times of that number?

Solution:

Let the number be x.

Question 59.

In a class of 40 students of the total number of students like to eat rice only, of the total number of students like to eat chapati only and the remaining students like to eat both. What fraction of the total number of students like to eat both?

Solution:

Total number of students = 40

Number of students who like to eat rice only of

Number of students who like to eat chapati only

Number of students who like to eat both rice and chapati = 40 – (8 + 16) = 16

∴ Required fraction

Question 60.

Renu completed part of her homework in 2 hours. How much part of her homework had she completed in hours?

Solution:

Let whole homework be denoted as x.

The part of home work completed by Renu is 2 hours

∴ The part of home work completed by her in 1 hour

So, the part of home work completed by her in hours

Hence, she completed part of her home work in hours.

Question 61.

Reemu read the th pages of a book. If she reads further 40 pages, she would have read pages of the book. How many pages are left to be read?

Solution:

Let total number of pages be x.

Number of pages read by Reemu

According to question,

Question 62.

Write the number in the box such that

Solution:

Let the number in the box be x.

∴ The required number is

Question 63.

Will the quotient be a fraction greater than 1.5 or less than 1.5? Explain.

Solution:

We have,

Since, 1.95 > 1.5

∴ The quotient of is a fraction greater than 1.5.

Question 64.

Describe two methods to compare and 0.82. Which do you think is easier and why?

Solution:

Method I: Conversion of both numbers and 0.82 into decimals

Method II: Conversion of both numbers and 0.82 into fractions

∴ Method of converting numbers into decimals is easier because we can easily compare the numbers in this method but in other method we will also convert the fractions into like fractions to compare the numbers.

Question 65.

Health: The directions for a pain reliever recommend that an adult of 60 kg and over take 4 tablets every 4 hours as needed, and an adult who weighs between 40 and 50 kg take only tablets every 4 hours as needed. Each tablet weighs gram.

(a) If a 72 kg adult takes 4 tablets, how many grams of pain reliever is he or she receivings?

(b) How many grams of pain reliever is the recommended dose for an adult weighing 46 kg?

Solution:

(a) Each tablet weighs gram

∴Weight of 4 tablets gram

(b) An adult weighing 46 kg takes only tablets.

∴ weight of tablets = gram

Question 66.

Animals: The label on a bottle of pet vitamins lists dosage guidelines. What dosage would you give to each of these animals?

(a) a 18 kg adult dog

(b) a 6 kg cat

(c) a 18 kg pregnant dog

Solution:

(a) Total dosage given to a 18 kg adult dog

(b) Total dosage given to a 6 kg cat

(c) Total dosage given to a 18 kg pregnant dog

Question 67.

How many kg boxes of chocolates can be made with kg chocolates?

Solution:

kg chocolates to be filled in 1 box.

∴ 1 kg chocolates to be filled in

= 1 × 16 = 16 boxes.

Now, kg chocolates to be filled in

boxes.

Question 68.

Anvi is making bookmarker like the one shown in the given figure. How many bookmarker can she make from a 15 m long ribbon?

Solution:

Length of one bookmarker =

∴ Number of bookmarker Anvi can make from 15 m ix., 15 × 100 cm long ribbon

Thus, Anvi can make 142 bookmaker from a 15 m long ribbon.

Question 69.

A rule for finding the approximate length of diagonal of a square is to multiply the length of a side of the square by 1.414. Find the length of the diagonal when :

(a) The length of a side of the square is 8.3 cm.

(b) The length of a side of the square is exactly 7.875 cm.

Solution:

(a) Length of a side of the square = 83 cm

∴ Length of the diagonal of the square

= 1.414 × 8.3 cm = 11.7362 cm

≈ 11.74 cm

(b) Length of a side of the square = 7.875 cm

Length of the diagonal of the square

= 1.414 × 7.875 cm

= 11.13525 cm

≈ 11.14 cm

Question 70.

The largest square that can be drawn in a circle has a side whose length is 0.707 times the diameter of the circle. By this rule, find the length of the side of such a square when the diameter of the circle is

(a) 14.35 cm

(b) 8.63 cm

Solution:

(a) Diameter of the circle = 14.35 cm ..

∴ Length of the side of the square

= 0.707 × 14.35 cm

= 10.14545 = 10.15 cm

(b) Diameter of the circle = 8.63 cm

∴ Length of the side of the square

= 0.707 × 8.63 cm

= 6.10141 cm = 6.10 cm

Question 71.

To find the distance around a circular disc, multiply the diameter of the disc by 3.14. What is the distance around the disc when :

(a) the diameter is 18.7 cm?

(b) the radius is 6.45 cm?

Solution:

(a) Diameter of the disc = 18.7 cm

∴ The distance around the disc

= 3.14 × 18.7 cm = 58.718 cm

(b) Radius of the disc = 6.45 cm

∴ Diameter of the disc = 2 × 6.45 cm = 12.9 cm

∴ The distance around the disc

= 3.14 × 12.9 cm = 40.506 cm

Question 72.

What is the cost of 27.5 m of cloth at ₹ 53.50 per metre?

Solution:

Cost of 1 metre of cloth = ₹ 53.50

∴ Cost of 275 metres of cloth = ₹ (53.50 × 27.5) = ₹ 1471.25

Question 73.

In a hurdle race, Nidhi is over hurdle B and of the way through the race, as shown in the given figure.

Solution:

Then, answer the following:

(a) Where will Nidhi be, when she is of the way through the race?

(b) Where will Nidhi be when she is of the way through the race?

(c) Give two fractions to tell what part of the race Nidhi has finished when she is over hurdle C.

Solution:

(a) When Nidhi is of the way through the race, she will be at hurdle D.

(b) When Nidhi is of the way through the race, she will be at hurdle E.

(c) When Nidhi is over hurdle C, she would finished the or middle part of the race.

Question 74.

Diameter of Earth is 12756000 m. In 1996, a new planet was discovered whose diameter is of the diameter of Earth. Find the diameter of this planet in km.

Solution:

Diameter of Earth = 12756000 m

Diameter of a new planet

= 741627.90 m

i.e.,

Question 75.

What is the product of reciprocal?

Solution:

The reciprocal of

Question 76.

Simplify:

Solution:

Question 77.

Simplify:

Solution:

Question 78.

Divide by

Solution:

Question 79.

of a number equals number?

Solution:

Let the number be x.

According to question,

⇒ x = 64

Hence, the required number is 64.

Question 80.

Heena’s father paid an electric bill of ₹ 95.70 out of a 500 rupee note. How much change should he have received?

Solution:

The amount of money Heena’s father has = ₹ 500

He paid an electric bill of ₹ 385.70

∴ The amount of money he should have received = ₹ (500 – 385.70) = ₹ 114.30

Question 81.

The normal body temperature is 98.6°F. When Savitri was ill her temperature rose to 103.1°F. How many degrees above normal was that?

Solution:

The normal body temperature = 98.6°F

Savitri’s temperature, when she was ill = 103.1°F

∴ Savitri’s temperature above normal

= 103.1°F – 98.6°F

= 4.5°F

Question 82.

Meteorology: One measure of average global temperature shows how each year varies from a base measure. The table shows results for several years.

Year | 1958 | 1964 | 1965 | 1978 | 2002 |

| 0.10°C | -0.17°C | -0.10°C | 0.54°C |

See the table and answer the following:

(a) Order the five years from coldest to warmest.

(b) In 1946, the average temperature varied by -0.03°C from the base measure. Between which two years should 1946 fall when the years are ordered from coldest to warmest?

Solution:

(a) Order of five years from coldest to warmest is 1964, 1965, 1978, 1958, 2002

(b) In 1946, the average temperature varied by -0.03°C.

Since,

∴ 1946 should fall between 1965 and 1978.

**Science Application**

Question 83.

In her science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights of:

(a) Oxygen and Hydrogen

(b) Oxygen and Helium

(c) Helium and Hydrogen

Solution:

Atomic weight of Helium = 4.0030

Atomic weight of Hydrogen = 1.0080

Atomic weight of Oxygen – 16.0000

(a) Difference between the atomic weights of Oxygen and Hydrogen

= 16.0000 – 1.0080

= 14.9920

(b) Difference between atomic weights of Oxygen and Helium = 16.0000 – 4.0030 = 11.9970

(c) Difference between atomic weights of Helium and Hydrogen = 4.0030 – 1.0080 = 2.9950

Question 84.

Measurement made in science lab must be as accurate as possible. Ravi measured the length of an iron rod and said it was 19.34 cm long; Kamal said 19.25 cm; and Tabish said 19.27 cm. The correct length was 19.33 cm. How much of error was made by each of the boys?

Solution:

The correct length of the iron rod = 19.33 cm

The length of the rod measured by Ravi = 19.34 cm

∴ Error made by Ravi = (19.34 – 19.33)cm = +0.01 cm

The length of the rod measured by Kamal = 19.25 cm

∴ Error made by Kamal = (19.25 – 19.33) cm = -0.08 cm

The length of the rod measured by Tabish = 19.27 cm

∴ Error made by Tabish = (19.27 – 19.33) cm = -0.06 cm.

Question 85.

When 0.02964 is divided by 0.004, what will be the Questionuotient?

Solution:

Question 86.

What number divided by 520 gives the same Questionuotient as 85 divided by 0.625?

Solution:

Let a number x be divided by 520.

According to question,

x ÷ 520 = 85 ÷ 0.625

= 70.72 × 1000 = 70720

Thus, the required number is 70720.

Question 87.

A floor is 4.5 m long and 3.6 m wide. A 6 cm square tile costs ₹ 23.25. What will be the cost to cover the floor with these tiles?

Solution:

Length of the floor = 4.5 m

= (4.5 × 100) cm = 450 cm

Width of the floor – 3.6 m – (3.6 × 100) cm = 360 cm

∴ Area of the floor – (450 × 360) cm^{2} = 162000 cm^{2}

Side of a square tile = 6 cm

∴ Area of one square tile = (6 × 6) cm^{2} = 36 cm^{2}

Number of tiles reqnuired to cover the floor

= 4500

Now, cost of one tile = ₹ 23.25

∴ Cost of 4500 tiles =₹ (23.25 ×4500)

= ₹ 104625

Question 88.

Sunita and Rehana want to make dresses for their dolls. Sunita has m of cloth, and she gave of it to Rehana. How much did Rehana have?

Solution:

Length of cloth Sunita has m

∴ Length of cloth Rehana has

Question 89.

A flower garden is 22.50 m long. Sheela wants to make a border along one side using bricks that are 0.25 m long. How many bricks will be needed?

Solution:

Length of the garden = 22.50 m

Length of one brick = 0.25 m

∴ Number of bricks required to make the border

Question 90.

How much cloth will be used in making 6 shirts, if each required m of cloth, allowing for waste in cutting and finishing in each shirt?

Solution:

Length of cloth required for one shirt

∴ Length of cloth required for 6 shirts

Question 91.

A picture hall has seats for 820 persons. At a recent film show, one usher guessed it was full, another that it was full. The ticket office reported 648 sales. Which usher (first or second) made the better guess?

Solution:

Total number of seats = 820

Sale of total tickets = 648

Number of sold tickets guessed by first usher

Number of sold tickets guessed by second usher

Since, 615 is more close to 648 than 547.

∴ First usher made the better guess.

Question 92.

For the celebrating children day, students of Class VII bought sweets for ₹ 740.25 and cold drink for ₹ 70. If 35 students contributed eQuestionually what amount was contributed by each student?

Solution:

Total spending amount = ₹740.25 + ₹70

= ₹ 3810.25

Total number of students who contributed money = ₹ 35

∴ Contribution of each student = ₹

= ₹ 23.15

Question 93.

The time taken by Rohan in five different races to run a distance of 500 m was 3.20 minutes, 3.37 minutes, 3.29 minutes, 3.17 minutes and 3.32 minutes. Find the average time taken by him in the races?

Solution:

Total time taken by Rohan in five races

= (3.20 +3.37 +3.29 +3.17 +3.32] minutes

= 16.35 minutes

Total number of races = 5

∴ The average time taken by Rohan

minutes = 3.27 minutes

Question 94.

A public sewer line is being installed along m of road. The supervisor says that the labourers will be able to complete 7.5 m in one day. How long will the project take to complete?

Solution:

Total length of a sewer line

7.5 m long sewer line completed in 1 day.

m long sewer line completed in

≈ 11 days

Question 95.

The weight of an object on moon is its weight on Earth.If an object weighs kg on Earth, how much would it weigh on the moon?

Solution:

Weight of the object on Earth

∴ Weight of that object on Moon

Question 96.

In a survey, 200 students were asked what influenced them most to buy their latest CD. The results are shown in the circle graph.

(a) How many students said radio influenced them most?

(b) How many more students were influenced by radio than by a music video channel?

(c) How many said a friend or relative influenced them or they heard the CD in a shop?

Solution:

Total number of students = 200

**(a)** Number of students who were influenced by radio

**(b)** Number of students who were influenced by music video channel

Number of students who were influenced by radio = 90

∴ 90-16-74 more students were influenced by radio than by a music video channel.

**(c)** Numberofstudents who were influenced by friend or relative

Number of students who were influenced by hearing or seeing the CD in a shop

∴Total number of students who were influenced by both friend or relative and hearing the CD in a shop = 30 + 20 – 50

Question 97.

In the morning, a milkman filled L of milk in his can. He sold to Renu, Kamla and Renuka L each; to Shadma he sold L; and to Jassi he gave L. How much milk is left in the can?

Solution:

Total quantity of milk in the can

Total quantity of milk to be sold to different persons

Now, quantity of milk left in the can

Question 98.

Anuradha can do a piece of work in 6 hours. What part of the work can she do in 1 hour, in 5 hours, in 6 hours?

Solution:

Let whole work be represented by W.

The part of work done by Anuradha in 6 hours = W

∴ The part of work done by her in 1 hour

The part of work done by her in 5 hours

The part of work done by her in 6 hours

Hence, Anuradha can do part of work in 1 hour, part of work in 5 hours and complete work in 6 hours.

Question 99.

What portion of a ‘saree’can Rehana paint in 1 hour if it requires 5 hours to paint the whole saree? In hours? In hours?

Solution:

Let total portion of saree be represented by 1.

The portion of saree painted by Rehana in 5 hours = 1.

∴ The portion of saree painted by her in 1 hour

The portion of Saree painted by her in

The portion of saree painted by her in

Question 100.

Rama has kg of cotton wool for making pillows. If one pillow takes kg, how many pillows can she make?

Solution:

Total quantity of cotton wool kg

Quantity of cotton wool required for one pillow

∴ Required number of pillows

Question 101.

It takes of cloth to make a shirt. How many shirts can Radhika make from a piece of cloth long?

Solution:

Total length of cloth

Length of the cloth reQuestionuired for one shirt

Question 102.

Ravi can walk km in one hour. How long will it take him to walk to his office which is 10 km from his home?

Solution:

Time taken by Ravi to walk km = 1 hour

∴ Time taken by him to walk 1 km

Question 103.

Raj travels 360 km on three fifths of his petrol tank. How far would he travel at the same rate with a full tank of petrol?

Solution:

Distance travelled by Raj with petrol tank = 360 km

Distance travelled by him with a full petrol tank

Question 104.

Kajol has ₹ 75. This is of the amount she earned. How much did she earn?

Solution:

Let money earned by Kajol be ₹ x.

According to question,

⇒ x = 200

∴ The amount earned by Kajol is ₹ 200.

Question 105.

It takes 17 full specific type of trees to make one tonne of paper. If there are 221 such trees in a forest, then

(i) what fraction of forest will be used to make;

(a) 5 tonnes of paper.

(b) 10 tonnes of paper.

(ii) To save part of the forest how much of paper we have to save.

Solution:

**(i)** Number of trees required to make one tonne of paper = 17

Total number of trees = 221

∴ Fraction of forest will be used to make one tonne of paper

(a) Fraction of forest will be used to make 5 tonnes of paper

(b) Fraction of forest will be used to make 10 tonnes of paper

**(ii)** Let we have to save x tonnes of paper to save part of forest

Fraction of forest will be used to make x tonnes of paper

Now,

Question 106.

Simplify and write the result in decimal form:

Solution:

Question 107.

Some pictures (a) to (f) are given below. Tell which of them show:

Solution:

- represents the addition of 2 figures, each representing 1 shaded part out of 4 equal parts. Hence is represented by (d).
- represents the addition of 2 figures, each representing 3 shaded parts out of 7 equal parts. Hence is represented by (f).
- represents the addition of 2 figures, each representing 1 shaded part out of 3 equal parts. Hence is represented by (c).
- represents the addition of 4figures, each representing 1 shaded part out of 4 equal parts. Hence is represented by (b).
- represents the addition of 3 figures, each representing 2 shaded parts out of 9 equal parts. Hence is represented by (a).
- represents the addition of 3 figures, each representing 1 shaded part out of 3 equal parts. Hence is represented by (e)

Question 108.

Evaluate : (0.3) × (0.3) – (0.2) (0.2)

Solution:

(0.3) × (0.3) – (0.2) ×(0.2)

Question 109.

Evaluate:

Solution:

Question 110.

Find the value of:

Solution:

Question 111.

A square and an equilateral triangle have a side in common. If side of triangle is cm long, find the perimeter of figure formed (see figure).

Solution:

Question 112.

Rita has bought a carpet of size But her room size is . What fraction of area should be cut off to fit wall to wall carpet into the room?

Solution:

Question 113.

Family photograph has length cm and breadth cm.It has border of uniform width cm. Find the area of framed photograph.

Solution:

Question 114.

Cost of a burger is ₹ and of Macpuff is ₹ Find the cost of 4 burgers and 14 macpuffs.

Solution:

Question 115.

A hill, m in height, has th of its height under water. What is the height of the hill visible above the water?

Solution:

Total height of the hill

Question 116.

Sports: Reaction time measures how Questionuickly a runner reacts to the starter pistol. In the 100 m dash at the 2004 Olympic Games, Lauryn Williams had a reaction time of 0.214 second. Her total race time, including reaction time, was 11.03 seconds. How long did it take her to run the actual distance?

Solution:

Total race time of Lauryn Williams = 11.03 seconds

Her reaction time = 0.214 second

∴ Time taken by her to run the actual distance

=(11.03 – 0.214) seconds = 10.816 seconds

Question 117.

State whether the answer is greater than 1 or less than 1. Put a’mark in appropriate box.

Solution:

Question 118.

There are four containers that are arranged in the ascending order of their heights. If the height of the smallest container given in the figure is expressed as cm.. Find the height of the largest container.

Solution:

Height of the smallest container = 10.5 cm

We have given that

∴ Height of the largest container is 37.5 cm.

**Directions: In questions 119 to 122, replace “?” with the appropriate fraction.**

Question 119.

Solution:

Here, the pattern is

Question 120.

Solution:

Here, the pattern is

Question 121.

Solution:

Here, the pattern is 0.05, 0.05 × 10 – 0.5, 0.5 × 10 – 5,5 × 10 = 50

∴ Next number will be 50 × 10 = 500

Question 122.

Solution:

Here, the pattern is

**Directions: What is the error in each of Question 123 and 124?**

Question 123.

A student compared and -0.3. He changed to the decimal -0.25 and wrote, “Since 0.3 is greater than 0.25,-0.3 is greater than -0.25”. What was the student’s error?

Solution:

Since 0.3 is greater than 0.25.

∴ -0.3 is less than -0.25

∴ The error is -0.30 >-0.25

Question 124.

A student multiplied two mixed fractions in the following manner: . What error the student has done?

Solution:

.

but given that

.

∴ Error is that mixed fractions are not converted into improper fractions.

Question 125.

In the pattern which fraction makes the sum greater than 1 (first time)? Explain.

Solution:

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