Page 102 - ICSE Math 4

Exercise 8.4

1. Write two like frac ons for each of the following.
3 4 7 9 5 6
(a) (b) (c) (d) (e) (f)
7 11 12 13 17 15

2. Write the equivalent frac ons represented by the following fi gures.

(a) (b)

1 = 1 =
2 5

(c) (d)

3 3
= =
4 5

3. Find whether the following frac ons are equivalent frac ons or not.
2 14 3 18 6 15 5 15
(a) and (b) and (c) and (d) and
3 21 7 28 7 21 9 27
Addition of Like Fractions

Look at the fi gure given alongside.

There are total 6 parts in the fi gure, out of which 2 are yellow parts
2
and 1 is green part. So, the frac on formed for yellow parts is and for
1 6
green part is .
6
Now, we can add the frac ons formed to fi nd the total number of coloured parts.
2 1 2 + 1 3
 Total number of coloured parts in the fi gure = + = =
6 6 6 6
So, there are 3 coloured parts out of 6 parts in the given fi gure.

In other words, we can say that to add like frac ons, we add the numerators and keep the
denominator as it is.
Example 3: Add the following frac ons.
2 3 3 5 1
(a) and (b) , and
8 8 14 14 14
2 3 2 + 3 5 3 5 1 3 + 5 + 1 9
Solu on: (a) + = = (b) + + = =
8 8 8 8 14 14 14 14 14

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