Question

3 целых 1/11 * 4 целых 2/5 + 1 целая 5/11 * 4 целых 2/5

Answer 1

$3 \frac{1}{11} \times 4 \frac{2}{5} + 1\frac{5}{11} \times 4 \frac{2}{5} = \\ \\ = 4 \frac{2}{5} (3 \frac{1}{11} + 1 \frac{5}{11}) = \\ \\ = \frac{22}{5} \times 4 \frac{6}{11} = \\ \\ = \frac{22 \times 50}{5 \times 11} = 20$