Question
Replace $\Box$ by the correct number:$\Box-\frac{1}{5}=\frac{1}{2}$
✓
Answer
$\frac{7}{10}-\frac{1}{5}=\frac{1}{2}$
Given: $\Box-\frac{1}{5}=\frac{1}{2}$
$\Rightarrow\Box=\frac{1}{5}+\frac{1}{2}$
$\Rightarrow\Box=\frac{1\times2}{5\times2}+\frac{1\times5}{2\times5}$ $($because $LCM$ of $5$ and $2$ is $10)$
$\Rightarrow\Box=\frac{2}{10}+\frac{5}{10}$
$\Rightarrow\Box=\frac{2+5}{10}$
$\Box=\frac{7}{10}$
Given: $\Box-\frac{1}{5}=\frac{1}{2}$
$\Rightarrow\Box=\frac{1}{5}+\frac{1}{2}$
$\Rightarrow\Box=\frac{1\times2}{5\times2}+\frac{1\times5}{2\times5}$ $($because $LCM$ of $5$ and $2$ is $10)$
$\Rightarrow\Box=\frac{2}{10}+\frac{5}{10}$
$\Rightarrow\Box=\frac{2+5}{10}$
$\Box=\frac{7}{10}$
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