Operations On Rational Numbers — Maths STD 7 — Question
Maharashtra BoardEnglish MediumSTD 7MathsOperations On Rational Numbers3 Marks
Question
What should be added to $\frac{-5}{7}$ so as to get $\frac{-2}{3}?$
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Answer
Let the required number be x
$\frac{-5}{7}+\text{x}=\frac{-2}{3}$
$\text{x}=\frac{-2}{3}-\frac{-5}{7}$
$\text{x}=\frac{-2\times7}{3\times7}-\frac{5\times3}{7\times3}$
$\text{x}=-\frac{14}{21}-\frac{-15}{21}$
$\text{x}=\frac{1}{21}$
The required number is $\frac{1}{21}$
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