Page 84 - ICSE Math 5

5. Write four unit fractions with denominators less than or equal to 20.
6. Reduce the following fractions to their lowest terms using the H.C.F. method.

45 12 129 117
(a) (b) (c) (d)
60 36 243 189
7. Convert the following improper fractions to mixed fractions.
98 108 314 223
(a) (b) (c) (d)
11 15 21 18
8. Convert the following mixed fractions to improper fractions.
12 13 6 2
(a) 3 (b) 9 (c) 4 (d) 8
25 19 17 9
9. Compare the following fractions and put the correct sign >, < or =.
13 11 4 5 14 14 12 11
(a) (b) (c) (d) 1 1
16 16 5 6 17 15 15 12
10. Arrange the following fractions in ascending order.
7 2 5 4 3 8 5 9 3 8 5 9
(a) , , , (b) , , , (c) 7 , , 2 ,
9 9 9 9 9 9 7 7 11 13 13 11
11. Arrange the following fractions in descending order.
7 2 5 11 3 4 1 2 3 29 5 9
(a) 3 , 7 , 5 , 4 (b) , , , (c) 4 , , 3 ,
12 12 12 12 11 9 9 11 11 6 6 11
12. Express each figure as a fraction and arrange in ascending order.

(a)

(i) (ii) (iii) (iv) (v)

(b)

(i) (ii) (iii) (iv) (v)

Addition and Subtraction of Like and Unlike Fractions

To add or subtract like fractions, we simply add or subtract the numerators and keep the
denominator the same.

2 5
Example 14: Add and .
9 9
2 5 2 + 5 7
Solution: + = =
9 9 9 9

7 13
Example 15: Subtract from .
18 18
13 7 13 – 7 6 2 × 3 1
Solution: – = = = =  Lowest terms
18 18 18 18 3 × 3 × 2 3
To add or subtract unlike fractions, we convert the given fractions to like fractions and then add
or subtract them.

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