# Q.4. Fill in the missing fractions. (a) $$\frac{7}{10} - \square = \frac{3}{10}$$ (b)$$\square - \frac{3}{21} = \frac{5}{21}$$ (c) $$\square - \frac{3}{6} = \frac{3}{6}$$ (d) $$\square + \frac{5}{27} = \frac{12}{27}$$

(a) $$\frac{7}{10} \square = \frac{3}{10}$$
Or, $$- \square = \frac{3}{10} - \frac{7}{10}$$
Or, $$-\square = - \frac{4}{10} = -\frac{2}{5}$$
Or, $$\square = \frac{2}{5}$$
(b) $$\square - \frac{3}{21} = \frac{5}{21}$$
Or, $$\square = \frac{5}{21} + \frac{3}{21}$$
Or, $$\square = \frac{8}{21}$$
(c) $$\square - \frac{3}{6} = \frac{3}{6}$$
Or, $$\square = \frac{3}{6} + \frac{3}{6}$$
Or, $$\square = \frac{6}{6} = 1$$ (d) $$\square + \frac{5}{27} = \frac{12}{27}$$
$$\square = \frac{12}{27} - \frac{5}{27}$$
$$\square = \frac{7}{27}$$