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Example 6: Add ` 12 and 35 p, and ` 15 and 70 p. Top Tip

Solution: Step 1: Add the paise. p If in addition of paise, the
`
35 + 70 = 105 12 35 sum is more than 100 paise,
1 is carried over to the
Since 100 p = ` 1, + 15 70 rupees column.

105 p = 100 p + 5 p 105

= ` 1 + 5 p
Carry over 1 to the rupee column. ` 1 p

Step 2: Add the rupees. 12 35
1 + 12 + 15 = 28 + 15 70

So, ` 12 and 35 p + ` 15 and 70 p = ` 28 and 05 p = ` 28.05. 28 05

Subtraction of Rupees and Paise

To subtract rupees and paise, we write rupees in one column and paise in the other column.

Then we subtract them like any other number. Top Tip
Example 7: Subtract ` 2.40 from ` 3.50.
We can also subtract by
Solution: Step 1: Subtract the paise. ` p putting a dot between
50 – 40 = 10 3 50 rupees and paise as
shown.
Step 2: Subtract the rupees. – 2 40 ` 3.50

3 – 2 = 1 1 10 – ` 2.40
So, ` 3.50 – ` 2.40 = ` 1.10. ` 1.10

Example 8: Subtract ` 80.55 from ` 110.90.

Solution: Step 1 Step 2
` p ` p

8 10 0 11 8 10
110 90 110 90
– 80 55 – 80 55

35 30 35

So, ` 110.90 – ` 80.55 = ` 30.35.

Mental Maths

Add or subtract mentally.
(a) ` 25.50 + ` 44.50 = __________ (b) ` 14.70 + ` 25.30 = __________
(c) ` 18.75 – ` 14.50 = __________ (d) ` 20.80 – ` 10.00 = __________

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