Page 142 - Math Skill - 5

140 Maths

Example 2: Add ` 146.50, ` 0.95 and ` 75.80. Example 3: Subtract ` 343.87 from ` 750.50.

Solution: Adding column-wise we get: Solution: Subtracting column-wise we get:

1 1 2 4 9 14 10
` 1 4 6 . 5 0 ` 7 5 0 . 5 0
` 0 . 9 5 – ` 3 4 3 . 8 7
+ ` 7 5 . 8 0 ` 4 0 6 . 6 3
` 2 2 3 . 2 5

Hence, the required sum is Hence, the required difference is
` 223.25 ` 406.63

Example 4: Find the value: ` 26.30 + ` 5.15 – ` 16.35.

Solution: 1 2 11
` 2 6 . 3 0 ` 3 1 . 4 5

+ ` 5 . 1 5 – ` 1 6 . 3 5
` 3 1 . 4 5 ` 1 5 . 1 0

Hence, the required sum is ` 15.10

Multiplication and Division of Money

We multiply or divide money by following the same rules as done for these operations in case
of decimal numbers. Let’s learn through examples.

Let’s Attempt

Example 1: Multiply ` 28.75 by 4. Example 2: Divide ` 658.70 by 14.

Solution: 3 3 2 Solution: 4 7 .0 5
` 2 8 . 7 5 14 6 5 8 .7 0
× 4 – 5 6

` 1 1 5 . 0 0 9 8
– 9 8
Hence, ` 28.75 × 4 = ` 115.00 7 0
– 7 0
×

Hence, ` 658.70 ÷ 14 = ` 47.05

Exercise 11.2

1. Solve the following.

(a) ` 64.65 + ` 89.85 (b) ` 110.25 + ` 63.05 – ` 15.75
(c) ` 500 – ` 195.95 (d) ` 472.56 + ` 157.35