O 3$$\frac{3}{8}$$ + (1$$\frac{2}{8}$$ - $$\frac{3}{8}$$)
1) 1$$\frac{2}{8}$$ - $$\frac{3}{8}$$ = $$\frac{10}{8}$$ - $$\frac{3}{8}$$ = $$\frac{7}{8}$$
2) 3$$\frac{3}{8}$$ + $$\frac{7}{8}$$ = 3$$\frac{10}{8}$$ = 4$$\frac{2}{8}$$ = 4$$\frac{1}{4}$$
Ответ: 4$$\frac{1}{4}$$