Автор - irina504tk

2 3/4:(1 1/2-2/5)+(3/4+5/6):3 1/6

Ответ

Автор - 11081957vera
1 1/2-2/5=3/2-2/5=15/10-4/10=11/10=1 1/10
2)2 3/4:1 1/10=11/4:11/10=5/2=2 1/2
3)  3/4+5/6=9/12+10/12=19/12 =1 7/12
4) 19/12:3 1/6=19/12:19/6=1/2
5) 2 1/2+1/2=3

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