Page 162 - Maths Skill - 3

160 Maths

Exercise 12.3

1. Add the following amounts.

(a) ` p (b) ` p (c) ` p
20 35 120 25 450 50
+ 65 45 + 35 90 + 49 50

2. Add the following amounts.

(a) ` 5 4 . 3 5 (b) ` 1 5 4 . 2 5 (c) ` 3 8 5 . 3 5
+ ` 8 2 . 9 0 + ` 2 0 2 . 1 0 + ` 5 8 2 . 9 0

3. Arrange the following in columns and add.

(a) ` 56.60, ` 25.80 and ` 90.65 (b) ` 135.86, ` 72.85 and ` 50.35

(c) ` 236.83, ` 19.38 and ` 38.65 (d) ` 120.60, ` 125.80 and ` 85.75

Subtraction of Money

For the subtraction of money, we follow these steps:
Step 1: Arrange the amounts in the columns of rupees and paise.

Step 2: Subtract the paise.

Step 3: Now, subtract the rupees.

Let’s Attempt

Example 1: Subtract ` 13.75 from ` 87.97. Alternate method

Solution: ` 8 7 . 9 7
` p – ` 1 3 . 7 5
87 97 ` 7 4 . 2 2
– 13 75
Thus, ` 87.97 – ` 13.75 = ` 74.22
74 22
Fact-o-meter
Example 2: Subtract ` 53.25 from ` 100. � In doing subtraction of money, always

Solution: ` p write the bigger number first and
regroup if needed.
0 9 9 9 10 � We can borrow or regroup as we do in
1 0 0 0 0 case of subtraction of ordinary numbers.
– 5 3 2 5
4 6 7 5 Thus, ` 100 – ` 53.25 = ` 46.75