Page 95 - Math Skill - 5

Decimal 93

2. Fill in the blanks.

(a) 63.15 × 1000 = ________ (b) 234.905 × 10 = ________
(c) 0.6 × 100 = ________ (d) 0.35 × 1000 = ________

3. Multiply the following.
(a) 2.5 by 0.4 (b) 0.13 by 0.6 (c) 16.34 by 2.9
(d) 38.38 by 0.7 (e) 0.002 by 3.24 (f) 6.005 by 2.45

4. Find the products.

(a) 5.063 × 0.009 (b) 0.3452 × 1.65 (c) 11.5 × 0.94
5. Multiply the following.

(a) 0.4 × 0.23 × 15 (b) 0.2 × 1.22 × 0.222 (c) 1.3 × 3.1 × 40

Division of Decimals

Division of Decimals by a Whole Number

To divide a decimal by a number, we follow these steps:

Step 1: Perform the division by considering the dividend as an ordinary number.
Step 2: When the division of the number part of the dividend is complete, put the decimal
point in the quotient and proceed with the division as in the case of ordinary

numbers.

Let us learn through examples.

Let’s Attempt

Example 1: Divide 3.45 by 25. Example 2: Divide 49.76 ÷ 16.
Solution: 345 ÷ 25 Solution: 4976 ÷ 16

1 3 .8 3 1 1
25 3 4 5 .0 16 4 9 7 6
– 2 5 – 4 8
9 5 1 7
– 7 5 – 1 6
2 0 0 1 6
– 2 0 0 – 1 6
× ×

345 ÷ 25 = 13.8 4976 ÷ 16 = 311
Thus, 3.45 ÷ 25 = 0.138 Thus, 49.76 ÷ 16 = 3.11
(shift 2 decimal places to the left)