Пошаговое объяснение:
35/67+(15/67-9/67)=41/67
15/67-9/67=6/67
35/67+6/67=41/67
(42/56+8/56)-29/56=21/56
42/56+8/56=50/56
50/56-29/56=21/56=3/8
203/300+(190/300-150/300)=163/300
190/300-150/300=40/300
203/300+40/300=243/300=81/100
