Page 119 - Start Up Mathematics_4

EXERCISE 8.4

1. Find the value.
2 1 3 1
(a) of 25 (b) of 18 (c) of 32 (d) of 20
5 3 4 5
4 2 6 7
(e) of 56 (f) of 28 (g) of 88 (h) of 72
7 7 11 9

2. Reduce to the lowest terms.
35 40 32 4
(a) (b) (c) (d) 2
49 64 8 12
81 15 28 36
(e) (f) (g) (h)
72 25 64 72
3. Find the sum and reduce to the lowest terms.

3 1 5 3 4 0 2 1
(a) + (b) + (c) + (d) +
5 5 9 7 7 7 5 8
4 5 8 3 2 10 9 4
(e) + (f) + (g) + (h) +
6 11 5 11 13 8 17 7
1 1 3 3 3 1 2 1
(i) 2 + 5 (j) 7 + 9 (k) 4 + 6 (l) 3 + 8
3 4 2 2 7 3 5 2
4. Find the difference and reduce to the lowest terms.

9 2 16 4 12 8 13 9
(a) – (b) – (c) – (d) –
20 11 15 7 17 17 2 4
16 13 14 1 18 15 19 16
(e) – (f) – (g) – (h) –
25 25 5 8 2 6 31 31

1 1 1 2 1 1 3 3
(i) 3 – 2 (j) 2 – 1 (k) 3 – 2 (l) 4 – 2
4 2 2 3 2 4 2 4
Word Problems

1
Example 25: Ruchika has 12 sweets. She gives 6 of them to her friend. How many sweets
is she left with?

Solution: Sweets with Ruchika = 12
1 1 2
Sweets given = of 12 = × 12 = 2
6 6
Sweets left = 12 – 2 = 10

Thus, Ruchika is left with 10 sweets.
1 1
Example 26: Sambhav had 15 bars of chocolates. He gave 3 bars to Sameer and 5 bars
to Meetu. He kept the rest of the bars with himself. Arrange the bars each

child got in descending order with their names.

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