Page 172 - Start Up Mathematics_1

For example, to add ` 2.40 to ` 3.50, make columns Quick Tip

as shown: We can also add by putting

` p a dot between rupees and
2 40 Step 1: Add the paise. paise as shown.
` 2.40
40 + 50 = 90 + ` 3.50
+ 3 50
Step 2: Add the rupees. ` 5.90

5 90 2 + 3 = 5 But the dots must be
placed one below the
So, ` 2 and 40 p + ` 3 and 50 p = ` 5 and 90 p other.
= ` 5.90

Let’s take another example.

Add ` 12 and 35 p to ` 15 and 70 p. Remember

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

105 105 p = 100 p + 5 p

= ` 1 + 5 p

Carry over 1 to the rupee column.
` p
1 Step 2: Add the rupees.
12 35
1 + 12 + 15 = 28
+ 15 70

28 05

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

7 Add the rupees and paise.

` p ` p ` p
(a) 65 30 (b) 48 65 (c) 72 45

+ 22 15 + 30 40 + 15 35

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