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Question

Estimate an approximate value of 103 x 51 by rounding off each number to the nearest ten .

A
500
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B
5000
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C
1000
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D
1500
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Solution

The correct option is B 5000
103 is rounded off to nearest ten gives 100 as ones digit 3 is less than 5.

51 is rounded off to nearest ten gives 50 as ones digit 1 is less than 5.

Now, 100×50=5000

Hence, an estimation of the approximate value of 103×51 will be 5000.

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