Page 102 - New Medley 3 Semester 2

B. Find the following by sketching and colouring the objects.
1 1 1
1. of 12 2. of 20 3. of 18
4 5 6
1 1 1
4. of 32 5. of 16 6. of 33
8 2 3

1 1 1
7. of 28 8. of 27 9. of 30
7 9 5

1 1 1
10. of 36 11. of 20 12. of 40
6 4 8

Addition and Subtraction of Fractions (with the same Denominator)

Addition

Let us consider the following paper strips.

+ =

2 3 5

(two-sixths) + (three-sixths) (five-sixths)
6 6 6
2

From the above, we see that the first strip is shaded in pink and the
6
3
second strip is shaded in yellow. The third strip shows both the shading
6
5
together, that is, of the strip.
6
2 3 5
Therefore, we can say + =
6 6 6

Again, consider the following example:

+ =

3 1 4

(three-fifths) (one-fifth) (four-fifths)
5 5 5
3 1 4  3+ 1 

Here, we see that + = = 
5 5 5  5 
 
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