Estimte the approximate answer of the multiplication 31 x 9.

400

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300

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100

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500

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Solution

The correct option is B 300
We can round off the above numbers so that the multiplication becomes easy.
31 can be rounded off to 30
9 can be rounded off to 10
Hence we get 30 x 10 = 300
is the aprroximate estimation of multiplication

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