Question

Convert the following Rational number into decimal number (-5)+[(-8)+7]​

Answer 1

It is not rational number.Rational should be in

$\frac{p}{q} \: form$

$(-5)+[(-8)+7] \\ - 5 + ( - 1) \\ = - 5 - 1 = - 6$

This is the answer for your question.

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