Question

Выполните вмножение 1 1/4×1 1/5 21/2×2 4/5

Answer 1

$\displaystyle 1 \frac{1}{4}*1 \frac{1}{5}= \frac{5}{4}* \frac{6}{5}= \frac{6}{4}=1 \frac{1}{2}=1,5 \\ \\ 2 \frac{1}{2}*2 \frac{4}{5}= \frac{5}{2}* \frac{14}{5}= \frac{14}{2}=7$