Page 67 - Viva

Exercise 4.7

1. Multiply by lattice method.
(a) 45 × 6 = _________ (b) 93 × 5 = _________

(c) 55 × 7 = _________ (d) 32 × 8 = _________

2. Multiply by lattice method and check by simple multiplication.
(a) 60 × 9 (b) 10 × 8 (c) 24 × 7

(d) 27 × 8 (e) 41 × 5 (f) 34 × 6

3. Multiply mentally using the most suitable method and write the answer.

(a) 38 × 8 = (b) 71 × 3 = (c) 25 × 4 = (d) 73 × 7 =

(e) 66 × 3 = (f) 99 × 9 = (g) 55 × 4 = (h) 64 × 5 =

4. Estimate the following products.

(a) 36 × 8 (b) 42 × 7 (c) 85 × 6

(d) 91 × 4 (e) 49 × 6 (f) 57 × 5
5. Solve the following problems using estimation method.

(a) Vinay bought 25 packets of candies. There were 7 candies in each packet. How
many candies did Vinay buy?

(b) A milkman has a container which contains 18 litres of milk. If the milkman
carries 4 such containers on his bicycle, how much milk is he carrying?

(c) In a library, 22 books can be arranged in a shelf. How many books can be
arranged in 5 such shelves?

Mental Maths

Solve mentally and answer.

(a) 5 × 0 = (b) 10 × 3 = (c) 8 × 4 =
(d) 8 times 5 is . (e) 9 multiplied by 3 is . (f) 6 times 4 is .

(g) 8 + 8 = × = (h) 0 × 46 =

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