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Question

Fill in the blank: (12)+(4+18)=[(12)+.....]+18

A
(12)
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B
4
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C
1
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D
18
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Solution

The correct option is B 4
Addition is associative for rational numbers
i.e. a+(b+c)=(a+b)+c
(12)+(4+18)=[(12)+4]+18

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