Page 108 - Maths Class 05

2. Multiply.

a. 0.4 × 0.4 b. 0.2 × 0.6 c. 0.2 × 0.4
d. 0.03 × 0.9 e. 0.008 × 14 f. 0.05 × 0.10

3. Multiply.

a. 1.8 × 1.23 b. 7 × 8.39 c. 4 × 44. 092
d. 1.236 × 8 e. 364 × 0.0 f. 9.7 × 0.8

g. 2 × 3.45 h. 2.9 × 0.06 i. 17.42 × 8

j. 3 × 3.48 k. 1.4 × 3.2 l. 0.5 × 0.7
4. Fill in the blanks.

a. 0.01 × ________ = 0.1 b. 2.7 × ________ = 270
c. 1.04 × ________ = 104 d. 2.002 × ________ = 2002

e. 3.21 × ________ = 32.1 f. 15.26 × ________ = 15260
g. 1.305 × ________ = 130.5 h. 0.109 × ________ = 10.9

i. 2.834 × ________ = 2834 j. 0.07 × ________ = 7

Division of Decimals

To divide decimals, you will once again apply the methods you use for dividing whole

numbers.

Division by 10, 100, 1000
Study the following examples :

1 4 8 8 1 8
1. 4 ÷ 10 = 4 × = = 0.4. 2. 0.8 ÷ 10 = ÷ 10 = × = = 0.08.
10 10 10 10 10 100

Ones Tenths Ones Tenths Hundredths

4 ÷10 8 ÷10

4 8

4 ones ÷ 10 = 4 tenths = 0.4 8 tenths ÷ 10 = 8 hundredths 10 ÷ 0.8 = 0.08

Dividing a decimal by 10 moves the decimal point one place to the left.

E.g. 0.09 ÷ 10 = 0.009

1 6 56 56 1
3. 6 ÷ 100 = 6 × = = 0.06. 4. 5.6 ÷ 100 = ÷ 100 = ×
100 100 10 10 100
56
= = 0.056
1000

Mathematics-5 108