Selina solutions for Concise Mathematics Class 7 ICSE chapter 4 - Decimal Fractions (Decimals) [Latest edition]

Convert the following into fraction in their lowest term: 3.75

Convert the following into fraction in their lowest term: 0.5

Convert the following into fraction in their lowest term: 2.04

Convert the following into fraction in their lowest term: 0.65

Convert the following into fraction in their lowest term: 2.405

Convert the following into fraction in their lowest term:  0.085

Convert the following into fraction in their lowest term:  8.025

Convert into decimal fractions `2 4/5`

Convert into decimal fractions `79/100`

Convert into decimal fractions `37/10000`

Convert into decimal fractions `7543/10^4`

Convert into decimal fractions `3/4`

Convert into decimal fractions `9 3/5`

Convert into decimal fractions `8 5/8`

Convert into decimal fractions `5 7/8`

Write the number of decimal places in: 0.4762

Write the number of decimal places in: 7.00349

Write the number of decimal places in: 8235.403

Write the number of decimal places in: 35.4

Write the number of decimal places in: 2.608

Write the number of decimal places in: 0.000879

Write the following decimals as word statements: 0.4, 0.9, 0.1

Write the following decimals as word statements: 1.9, 4.4, 7.5

Write the following decimal as word statement: 0.02, 0.56, 13.06

Write the following decimal as word statement: 0.005,0.207, 111.519

Write the following decimal as word statement: 0.8, 0.08, 0.008, 0.0008

Write the following decimal as word statement: 256.1, 10.22, 0.634

Convert the given fraction into like a fraction:

0.5, 3.62, 43.987 and 232.0037

Convert the given fraction into like a fraction:

215.78, 33.0006, 530.3 and 0.03569

Add:  0.5 and 0.37

Add: 3.8 and 8.7

Add: 0.02, 0.008 and 0.309

Add: 0. 4136, 0. 3195 and 0.52

Add: 9.25, 3.4 and 6.666

Add: 3.007, 0.587 and 18.341

Add: 0.2, 0.02 and 2.0002

Add: 6.08, 60.8, 0.608 and 0.0608

Add: 29.03, 0.0003, 0.3 and 7.2

Add: 3.4, 2.025, 9.36 and 3.6221

Subtract the first number from the second:

5.4, 9.8

Subtract the first number from the second:

0.16, 4.3

Subtract the first number from the second:

0.82, 8.6

Subtract the first number from the second:

0.07, 8.43

Subtract the first number from the second:

2.237, 9.425

Subtract the first number from the second:

41.03, 59.46

Subtract the first number from the second:

3.92, 26.86

Subtract the first number from the second:

4.73, 8.5

Subtract the first number from the second:

12.63, 36.2

Subtract the first number from the second:

0.845, 3.71

Simplify: 28.796 -13.42 – 2.555

Simplify: 93.354 – 62.82 – 13.045

Simplify: 36 – 18.59 – 3.2

Simplify: 86 + 16.95 – 3.0042

Simplify: 32.8 – 13 – 10.725 +3.517

Simplify: 4000 – 30.51 – 753.101 – 69.43

Simplify: 0.1835 + 163.2005 – 25.9 – 100

Simplify: 38.00 – 30 + 200.200 – 0.230

Simplify: 555.555 + 55.555 – 5.55 – 0.555

Find the difference between 6.85 and 0.685.

Take out the sum of 19.38 and 56.025 then subtract it from 200.111.

Add 13.95 and 1.003; and from the result, subtract the sum of 2.794 and 6.2.

What should be added to 39.587 to give 80.375?

What should be subtracted from 100 to give 19.29?

What is the excess of 584.29 over 213.95?

Evaluate: (5.4 – 0.8) + (2.97 -1.462)

Evaluate: (6.25 + 0.36) - (17.2 – 8.97)

Evaluate: 9.001 + (3 - 2.462)

Evaluate: 879.4 – (87.94 – 8 .794)

What is the excess of 75 over 48.29?

If A = 237.98 and B = 83.47.

Find: (i) A - B  (ii) B - A

The cost of one kg of sugar increases from 28.47 to 32.65. Find the increase in cost.

Multiply:  0.87 by 10

Multiply: 2.948 by 100

Multiply: 6.4 by 1000

Multiply: 5.8 by 4

Multiply: 16.32 by 28

Multiply: 5.037 by 8

Multiply: 4.6 by 2.1

Multiply: 0.568 by 6.4

Multiply the number by 10, 100, 1000: 0.5

Multiply the number by 10, 100, 1000: 0.112

Multiply the number by 10, 100, 1000: 4.8

Multiply the number by 10, 100, 1000: 0.0359

Multiply the number by 10, 100, 1000: 16.27

Multiply the number by 10, 100, 1000: 234.8

Evaluate: 5.897 x 2.3

Evaluate: 0.894 x 87

Evaluate: 0.01 × 0.001

Evaluate: 0.84 × 2.2 × 4

Evaluate: 4.75 x 0.08 x 3

Evaluate: 2.4 × 3.5 × 4.8

Evaluate: 0.8 × 1.2 × 0.25

Evaluate: 0.3 × 0.03 × 0.003

Evaluate: 12.003 × (0.2)5

Divide: 54.9 by 10

Divide: 7.8 by 100

Divide: 324.76 by 1000

Divide: 12.8 by 4

Divide: 27.918 by 9

Divide: 4.672 by 8

Divide: 4.32 by 1.2

Divide: 7.644 by 1.4

Divide: 4.8432 by 0.08

Divide the given number by 10, 100, 1000 and 10000 
2.1

Divide the given number by 10, 100, 1000 and 10000 
8.64

Divide the given number by 10, 100, 1000 and 10000 
5.01

Divide the given number by 10, 100, 1000 and 10000 
0.0906

Divide the given number by 10, 100, 1000 and 10000 
0.125

Divide the given number by 10, 100, 1000 and 10000 
111.11

Divide the given number by 10, 100, 1000 and 10000 
0.848 x 3

Divide the given number by 10, 100, 1000 and 10000
4.906 x (0.2) ²

Divide the given number by 10, 100, 1000 and 10000
(1.2)² x(0.9)²

Evaluate: 9.75 ÷ 5

Evaluate: 4.4064 ÷ 4

Evaluate: 27.69 ÷ 30

Evaluate: 19.25 ÷ 25

Evaluate: 20.64 ÷ 16

Evaluate: 3.204 ÷ 9

Evaluate: 0.125 ÷ 25 

Evaluate: 0.14616 ÷ 72 

Evaluate: 0.6227 ÷ 1300 

Evaluate: 257.894 ÷ 0.169

Evaluate: 6.3 ÷ (0.3)² 

Evaluate: 4.3 x 0.52 x 0.3

Evaluate: 3.2 x 2.5 x 0.7

Evaluate: 0.8 x 1.5 x 0.6

Evaluate: 0.3 x 0.3 x 0.3

Evaluate: 1.2 x 1.2 x 0.4

Evaluate: 0.4 x 0.04 x 0.004

Evaluate: 0.5 x 0.6 x 0.7

Evaluate: 0.5 x 0.06 x 0.007

Evaluate: (0.9)²

Evaluate: (0.6)² x 0.5

Evaluate: 0.3 x (0.5)²

Evaluate: (0.4)³

Evaluate: (0.2)³ x 5

Evaluate: (0.2)3 x 0.05

Find the cost of 36.75 kg wheat at the rate of ₹12.80 per kg.

The cost of a pen is ₹56.15. Find the cost of 16 such pens.

Evaluate: 0.0072 ÷ 0.06

Evaluate: 0.621 ÷ 0.3

Evaluate: 0.0532 ÷ 0.005

Evaluate: 0.01162 ÷ 0.14

Evaluate: (7.5 x 40.4) ÷ 25

Evaluate: 2.1 ÷ (0.1 x 0.1)

Fifteen indentical articles weigh 31.50 kg. Find the weight of each article.

The product of two numbers is 211.2. If one of these two numbers is 16.5, find the other number.

One dozen identical articles cost ₹45.96. Find the cost of each article.

Find whether the given division forms a terminating decimal or a non-terminating decimal:

3 ÷ 8

Find whether the given division forms a terminating decimal or a non-terminating decimal:

8 ÷ 3

Find whether the given division forms a terminating decimal or a non-terminating decimal:

6 ÷ 5

Find whether the given division forms a terminating decimal or a non-terminating decimal:

5 ÷ 6

Find whether the given division forms a terminating decimal or a non-terminating decimal:

12.5 ÷ 4 

Find whether the given division forms a terminating decimal or a non-terminating decimal:

23 ÷ 0.7

Find whether the given division forms a terminating decimal or a non-terminating decimal:

42 ÷ 9 = 4.666...

Find whether the given division forms a terminating decimal or a non-terminating decimal:

0.56 ÷ 0.11

Express as recurring decimal: `1 1/3`

Express as recurring decimal: `10/11`

Express as recurring decimal: `5/6`

Express as recurring decimal: `2/13`

Express as recurring decimal: `1/9`

Express as recurring decimal: `17/90`

Express as recurring decimal: `5/18`

Express as recurring decimal: `7/12`

Convert into vulgar fraction: `0.bar3`

Convert into vulgar fraction: `0.bar8`

Convert into vulgar fraction: `4.bar4`

Convert into vulgar fraction: `23.bar7`

Convert into vulgar fraction: `0.bar35`

Convert into vulgar fraction: `2.bar23`

Convert into vulgar fraction: `1.bar28`

Convert into vulgar fraction: `5.bar234`

Convert into vulgar fraction: `0.3bar7`

Convert into vulgar fraction: `0.2bar45`

Convert into vulgar fraction: `0.68bar5`

Convert into vulgar fraction: `0.4bar42`

Round off: 0 .07, 0.112, 3.59, 9.489 to the nearest tenths.

Round off: 0.627, 100.479, 0 065 and 0.024 to the nearest hundredths.

Round off: 4.83,0.86,451 .943 and 9.08 to the nearest whole number.

Simplify, and write your answer correct to the nearest hundredths:

18 .35 x 1.2

Simplify, and write your answer correct to the nearest hundredths:

62.89 x 0.02

Write the number of significant figures (digits) in 35.06.

Write the number of significant figures (digits) in 0.35.

Write the number of significant figures (digits) in 7.0068.

Write the number of significant figures (digits) in 19 .0.

Write the number of significant figures (digits) in 0.0062.

Write the number of significant figures (digits) in 0 4.2 x 0.6

Write the number of significant figures (digits) in 0.08 x 25.

Write the number of significant figures (digits) in 3.6 ÷ 0.12.

Write 35.869,0 008426,4.952 and 382.7, correct to three significant figures.

Write 60.974. 2.8753, 0.001789 and 400.04, correct to four significant figure.

Write 14.29462, 19.2, 46356.82 and 69, correct to five significant figures.

The weight of an object is 3 .06 kg. Find the total weight of 48 similar objects.

Find die cost of 17.5 m cloth at the rate of Rs. 112.50 per meter.

One kilogram of oil costs Rs. 73.40. Find the cost of 9.75 kilograms of oil.

Total weight of 8 identical objects is 51.2 kg. Find the weight of each object.

18.5 m of cloth costs Rs. 666. Find the cost of 3.8 m cloth.

Find die value of:  0.5 of Rs. 7.60 + 1.62 of Rs. 30

Find die value of: 2.3 of 7.3 kg + 0.9 of 0.48 kg

Find die value of: 6.25 of 8.4 – 4.7 of 3.24

Find die value of: 0.98 of 235 – 0 .09 of 3.2

Evaluate: 5.6 – 1 .5 of 3.4

Evaluate: 4.8 ÷ 0.04 of 5

Evaluate: 0.72 of 80 ÷ 0.2

Evaluate: 0.72 ÷ 80 of 0.2

Evaluate: 6.45 + (3.9 – 1.75)

Evaluate: 0.12 of(0.104 – 0.02)+ 0.36 x 0.5