Gujarat BoardEnglish MediumSTD 7MATHSRational Numbers2 Marks
Question
Find the sum $\frac{-3}{-11}+\frac{5}{9}$
✓
Answer
As the denominators are different find the $LCM$ of $11 \& 9$
$\frac{-3}{-11}+\frac{5}{9}$,
$LCM$ of $11$ and $9$ is $99.$
$3\over 11 $= $3\times9\over 11\times9$ = $27\over 99$
$5\over 9$ = $5\times11\over 9\times11$ = $55\over 99$
Thus,
$\frac{3}{11}+\frac{5}{9}=\frac{27}{99}+\frac{55}{99}=\frac{27+55}{99}=\frac{82}{99}$
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