N1
1)2/3-2/7=14/21-6/21=8/21
2)1 5/6:8/21=11/6:8/21=11/6*21/8=11/2*7/8=77/16=4 13/16
Ответ:4 13/16
N2
1)(7-56)/36=-49/36
2)-49/36:49/6=-49/36*6/49=-1/6*1/1=-1/6
3)-1/6*6/7=-1/1*1/7=-1/7
Ответ:-1/7
1)5/6:8/21=5/6•21/8=5/2•7/8=35/16
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N1
1)2/3-2/7=14/21-6/21=8/21
2)1 5/6:8/21=11/6:8/21=11/6*21/8=11/2*7/8=77/16=4 13/16
Ответ:4 13/16
N2
1)(7-56)/36=-49/36
2)-49/36:49/6=-49/36*6/49=-1/6*1/1=-1/6
3)-1/6*6/7=-1/1*1/7=-1/7
Ответ:-1/7
1)5/6:8/21=5/6•21/8=5/2•7/8=35/16