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Question

Solve 2×(81×5) using suitable properties of whole numbers.

A
810
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B
180
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C
360
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D
540
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Solution

The correct option is A 810
2×(81×5)
Using commutativity
= 2×(5×81)
Using associativity
= (2×5)×81
= 10×81
= 810

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