б) 4 7/9 - 3 = 5 1/3 - 5 = 9 3/7 - 3/7 = г) 6 4/5 + 1/5 = 1- 1/2 = 1- 3/4 =

б)

• $$4\frac{7}{9} - 3 = 1\frac{7}{9}$$
• $$5\frac{1}{3} - 5 = \frac{1}{3}$$
• $$9\frac{3}{7} - \frac{3}{7} = 9$$

г)

• $$6\frac{4}{5} + \frac{1}{5} = 6\frac{5}{5} = 7$$
• $$1 - \frac{1}{2} = \frac{2}{2} - \frac{1}{2} = \frac{1}{2}$$
• $$1 - \frac{3}{4} = \frac{4}{4} - \frac{3}{4} = \frac{1}{4}$$

Ответ: б) $$1\frac{7}{9}$$, $$\frac{1}{3}$$, $$9$$; г) $$7$$, $$\frac{1}{2}$$, $$\frac{1}{4}$$