Page 72 - Start Up Mathematics_3

2. Find the following products.

H T O H T O Th H T O

(a) 3 2 (b) 4 1 (c) 6 4

× 1 4 × 2 2 × 5 2

Th H T O Th H T O Th H T O

(d) 8 7 (e) 5 8 (f) 7 5

× 9 3 × 6 7 × 2 8

3. Circle the correct answer.

(a) 73 × 100 = 730 7300 73000

(b) 42 × 11 = 462 442 422

(c) 350 × 10 = 350 3500 35000

(d) 108 × 1000 = 10800 1080 108000

4. Multiply and write the product.

(a) 27 × 15 (b) 68 × 42 (c) 45 × 18 (d) 73 × 44

(e) 86 × 53 (f) 39 × 26 (g) 75 × 35 (h) 92 × 64

5. Multiply using the shortcut method.
(a) 38 × 8 (b) 71 × 9 (c) 25 × 4 (d) 73 × 7

(e) 66 × 6 (f) 99 × 9 (g) 55 × 7 (h) 64 × 5

Estimating Products

By using the method of estimation while multiplying numbers, we can find a product
quickly. This product will only be a rough estimation and will differ from the actual
product.

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