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Question
For the pair of rational numbers, given below, verify that the multiplication is commutative.
`0 "and" (-12)/17`
Solution
`= 0 xx (-12)/17 = (0xx(-12))/(1xx17) = 0`
And `(-12)/17 xx 0 = ((-12)xx0)/(17xx1) = 0`
`therefore 0 xx (-12)/17 = (-12)/17 xx 0`
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