Question

4(3/2/5-1/7/40)+12,5

Answer 1

Ответ:

$4(3 \frac{2}{5} - 1 \frac{7}{40} ) + 12.5 = 4(3 \frac{16}{40} - 1 \frac{7}{40} ) + 12.5 = 4 \times 2 \frac{9}{40} + 12.5 = \frac{4 \times 89}{40} + 12.5 = 8.9 + 12.5 = 21.4$