4-3,3:(2 1/7- 1 1/5)=0,5
1) 2 1/7-1 1/5=2 5/35-1 7/35=75/35-42/35=33/35
2) 33/10:33/35=33/10*35/33=7/2=3 1/2=3.5
3) 4-3.5=0.5
Ответ: 0,5
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4-3,3:(2 1/7- 1 1/5)=0,5
1) 2 1/7-1 1/5=2 5/35-1 7/35=75/35-42/35=33/35
2) 33/10:33/35=33/10*35/33=7/2=3 1/2=3.5
3) 4-3.5=0.5
Ответ: 0,5