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example 6. A bottle contains 5 litres of milk. If 3 litres were taken out, how much
8 8
milk was left in the bottle?
5
Solution. Quantity of milk in the bottle = L
3 8
Quantity of milk taken out = L
8
5
Quantity of milk left in the bottle = 3 5 3 = 2 = 1 L
1 8 8 8 8 4
Thus, L of milk was left in the bottle.
4

Exercise 6E

1. Find the sum and convert the answer into the simplest form.
9 8 5 8 2 4 6 1
a. + b. + c. + d. +
19 19 15 15 9 9 12 12
10 5 4 5 2 8 3 7 1 3 5
e. + f. + + g. + + h. + +
18 18 27 27 27 20 20 20 16 16 16
2. Subtract the following and reduce the difference to the simplest form.
10 7 6 3 9 9 5 3
a. - b. - c. - d. -
11 11 8 8 13 13 16 16
9 7 4 1 6 4 8 4
e. - f. - g. - h. -
17 17 11 11 18 18 9 9
3. Solve the following word problems:
1 2
a. A jug is full of juice. Later, more of the jug is filled. What fraction of the
4 4
jug is now full?
3
b. The length of a red ribbon is m and the length of a pink ribbon is
4
1 m. Find the total length of both the ribbons.
4 5 2
c. Ram goes to school travelling km by bus and km on foot. How
8 8
much distance does Ram cover in all?
7 4
d. Geeta reads a book for hour and plays video games for hour. How much
12 12
time does she spend on both activities?
6 5
e. Neelima jumped metre and Ridhima jumped metre.
8 8
Who jumped a greater distance and by how much?
3 4 5
f. The sides of a triangle are m, m and m respectively. What is the total

length of all three sides? 12 12 12

106 Mathematics 4