Выполните умножение : 1) 1 3/7 ×2×4/5×3/4; 2) 3 3/4×5/12×8/15; 3) 1 5/6×8 2/11 ×4/9; 4) 2...

1) $\frac{10}{7}$ * 2 * $\frac{1}{5}$ * 3= $\frac{2}{7}$ * 2 * 3 = $\frac{12}{7}$ = $1 \frac{5}{7}$ = 1,71429
2) $\frac{15}{4}$ * $\frac{5}{12}$ * $\frac{8}{15}$ = $\frac{5}{12}$ * 2 = $\frac{5}{6}$ = 0,8(3)
3) $\frac{11}{6}$ * $\frac{90}{11}$ * $\frac{4}{9}$ = 15 * $\frac{4}{3}$ = $\frac{20}{3}$ = $6 \frac{2}{3}$ = 6,66667
4) $\frac{55}{27}$ * $\frac{16}{5}$ * $\frac{81}{11}$ = 11 * 16 * $\frac{3}{11}$ = 16 *3= 48