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Exercise 4F

1. Find the estimated quotients by rounding the numbers to their highest place.
a. 81 ÷ 18 b. 95 ÷ 14 c. 88 ÷ 34 d. 257 ÷ 28

e. 402 ÷ 44 f. 1821 ÷ 22 g. 4620 ÷ 48 h. 2004 ÷ 53

2. Match the following columns correctly:
Column A Column B Column C
(Division) (Rounds to) (Estimated quotients)

a. 76 ÷ 24 i. 90 ÷ 30 I. 5

b. 93 ÷ 27 ii. 300 ÷ 60 II. 3
c. 573 ÷ 42 iii. 80 ÷ 20 III. 10

d. 305 ÷ 61 iv. 900 ÷ 90 IV. 15
e. 857 ÷ 93 v. 600 ÷ 40 V. 4

WoRD PRoBlEMs

Example 1. There are an equal number of students in each class of Blue Marble School.
If there are 248 students in 4 classes, how many students are there in each class?

solution. 6 2

Number of classes = 4 4 2 4 8
Total number of students = 248 – 2 4

Number of students in each class = 248 ÷ 4 8
= 62 – 8

Thus, the number of students in each class is 62. 0

Example 2. If 7488 kg of rice is filled in 16 sacks equally, find the weight of rice in each
sack. 4 6 8
solution. 16 7 4 8 8

Total quantity of rice = 7488 kg – 6 4
Number of sacks = 16 1 0 8

Quantity of rice in each sack = 7488 ÷ 16 – 9 6
= 468 kg – 1 2 8
1 2 8
Thus, the weight of rice in each sack = 468 kg. 0

72 Mathematics 4