Question

1 5/7 × 1 1/2 + 6/7 × 6 4/5 срочно пожалуйста

Answer 1

18/7 + 204/35 = (90+204)/35 = 294/35 = 8 2/5.

Answer 2

$1\frac{5}{7}\times \:1\frac{1}{2}+\frac{6}{7}\times \:6\frac{4}{5}=\frac{12}{7}\times \frac{3}{2}+\frac{6}{7}\times \frac{34}{5}=\frac{18}{7}+\frac{204}{35}=\frac{18\times \:5}{35}+\frac{204}{35} \\ \\ = \frac{5\times \:18+204}{35}=\frac{294}{35}=\frac{42}{5}=8\frac{2}{5}=8.4 \\ \\ \\ \mathfrak{OTBET} : 8.4$