Question

Find:
(i) 1.3 × 10
(ii) 36.8 × 10
(iii) 153.7 × 10
(iv) 168.07 × 10
(v) 31.1 × 100
(vi) 156.1 × 100
(vii) 3.62 × 100
(viii) 43.07 × 100
(ix) 0.5 × 10
(x) 0.08 × 10
(xi) 0.9 × 100
(xii) 0.03 × 1000

Answer 1

We know that when a decimal number is multiplied by 10, 100, 1000, the decimal point in the product is shifted to the right by as many places as there are zeroes. Therefore, these products can be calculated as
(i) 1.3 × 10 = 13

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(ii) 36.8 × 10 = 368

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(iii) 153.7 × 1 = 153.7

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(iv) 168.07 × 10 = 1680.7

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(v) 31.1 × 100 = 3110

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(vi) 156.1 × 100 = 15610

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(vii) 3.62 × 100 = 362

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(viii) 43.07× 100 = 4307

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(ix) 0.5 × 10 = 5

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(x) 0.08 × 10 = 0.8

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(xi) 0.9 × 100 = 90

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(xii) 0.03 × 1000 = 30