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Question

Is -1620and20-25represent the same rational number?


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Solution

Given -1620and20-25

First, we find their standard forms and then compare them.

The standard form of a rational number-1620 is -16÷420÷4=-45{sinceHCF(16,20)=4}

And the standard form of a rational number 20-25is20÷(-5)-25÷(-5)=-45{sinceHCF(20,25)=5}

since -45=-45

Therefore, their standard forms are the same, which means they are equivalent.

Hence,-1620and20-25 represents the same rational number.


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