Page 58 - ICSE Math 5

Exercise 4.5

Solve the following.

(a) 15 + 42  7 × 3 –2 (b) 12  2 + 15 – 4 (c) 12  6 × 3 + 2
(d) 18 – 4 × 2 + 8 (e) 75  5 + 108 × 2 (f) 2,800 – 400 × 350  50

Review Exercise

1. Construct the multiplication tables of the following numbers as instructed.

(a) Table of 13 using repeated addition
(b) Table of 16 using skip counting

(c) Table of 19 by adding 1 to 10

2. Multiply using long multiplication method.
(a) 3,524 × 60 (b) 4,391 × 32 (c) 5,297 × 400

(d) 2,563 × 324 (e) 2,650 × 9,000 (f) 3,168 × 1,928

3. Divide using long division method and find the quotient. Also, check the answer.
(a) 720  16 (b) 675  27 (c) 975  25

(d) 8,160  85 (e) 5,655  65 (f) 3,444  42

4. Multiply using lattice multiplication and verify the answer by simple multiplication.
(a) 1,462 × 15 (b) 6,429 × 18 (c) 9,171 × 108

(d) 1,561 × 243 (e) 7,365 × 1,002 (f) 5,908 × 165

5. Multiply using the expanded form and check the answer by actual multiplication.
(a) 9,450 × 21 (b) 6,239 × 204 (c) 3,952 × 191

(d) 8,624 × 1,620 (e) 4,444 × 44 (f) 8,024 × 103
6. Divide using breaking a number and then dividing method.

(a) 8,720  20 (b) 4,840  40 (c) 2,550  25

(d) 4,680  10 (e) 9,850  25 (f) 2,128  14
7. Estimate the quotients of the following by rounding off to the nearest 10. Also, find the
actual quotient and remainder.

(a) 842  24 (b) 204  12 (c) 6,058  25
(d) 4,582  21 (e) 8,902  96 (f) 4,696  18

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