Question

Find the product of the following by writing one of numbers as the sum or difference of two numbers -

785*105
1006*95
3096*91​

Answer 1

Explanation:

Use distributive property: a*(b+c) =a*b +a*c

1) 785 * 105 = 785 * (100 + 5)

= 785*100 + 785*5

= 78500 + 3925

= 82425

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2) 1006 * 95 = (1000 + 6) *95

= 1000*95 + 6*95

= 95000 + 570

= 95570

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3) 3096*91 = 3096 * (100 - 9)

= 3096*100 - 3096*9

= 309600 - 27864

= 281736