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प्रश्न
For the pair of rational numbers, given below, verify that the multiplication is commutative.
`3 "and" (-8)/9`
योग
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उत्तर
`= 3/1 xx (-8)/9 = (1xx(-8))/(1xx3) = (-8)/3`
And, `(-8)/9 xx 3/1 = ((-8)xx1)/(3xx1) = (-8)/3`
`therefore 3 xx (-8)/9 = (-8)/9 xx 3`
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