прсу.
5 7/16*8
8 3/28*5
5*3 1/5

[tex]5 \frac{7}{16}\cdot 8= \frac{87}{16}\cdot 8=\frac{87\cdot 8}{16}= \frac{87}{2}=43,5 \\ 8 \frac{3}{23} \cdot 5= \frac{187}{23}\cdot 5= \frac{187\cdot 5}{23}= \frac{936}{23}=40 \frac{16}{23} \\ 5\cdot 3 \frac{1}{5}= 5\cdot \frac{16}{5}=\frac{5\cdot 16}{5}=16 [/tex]