1216 помогите пжжжжжжжжжжж

Question

1216 помогите пжжжжжжжжжжж

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Answer 1

А)12 3/5-7 1/6= 63/5-43/6=163/30=5 13/30
5 13/30+2 3/10=7 11/15
б)4/5:2 2/3=3/10
3/10+3 1/2=3 4/5
в)2 4/9:3 2/3= 2/3
170 8/51-2/3=169 25/51