Question

8*7+8*3 16*25-16*5  скоротить

Answer 1

8*7+8*3=80;
56+24=80.
16*25-16*5=320;
400-80=320.

Answer 2

$frac{8*7+8*3}{16*25-16*5} = frac{56+24}{400-80} = frac{80}{320} = frac{1}{4}$