Вычислите Е) $$2\frac{1}{4} - 1\frac{3}{4} = 1 - \frac{2}{4} = \frac{1}{2}$$

Е)

$$2\frac{1}{4} - 1\frac{3}{4} = \frac{2 \times 4 + 1}{4} - \frac{1 \times 4 + 3}{4} = \frac{9}{4} - \frac{7}{4} = \frac{9-7}{4} = \frac{2}{4} = \frac{1}{2}$$