4.  Fill in the boxes :

            (a)   \square-\frac{5}{8}=\frac{1}{4}

            (b)  \square-\frac{1}{5}=\frac{1}{2}

            (c)  \frac{1}{2}-\square =\frac{1}{6}

Answers (1)

(a)   \square-\frac{5}{8}=\frac{1}{4}  :-       

      \square\ =\ \frac{1}{4}\ +\ \frac{5}{8}\ =\ \frac{1\times 8\ +\ 5\times 4}{32}\ =\ \frac{28}{32}\ =\ \frac{7}{8}

(b)    \square-\frac{1}{5}=\frac{1}{2}   :-  

      \square\ =\ \frac{1}{2}\ +\ \frac{1}{5}\ =\ \frac{1\times 5\ +\ 1\times 2}{10}\ =\ \frac{7}{10}

(c)  \frac{1}{2}-\square =\frac{1}{6}    :- 

     \square\ =\ \frac{1}{2}\ -\ \frac{1}{6}\ =\ \frac{1\times 6\ -\ 1\times 2}{12}\ =\ \frac{4}{12}\ =\ \frac{1}{3}

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