Ответ:
1) 3:1-1/2
1-1/2=1/2
3:1/2=6
2) 1-1/4:1 1/2
1-1/4=3/4
1 1/2= 3/2:3/4=2
3) 2/3+1/4:1 5/6
2/3+1/4=11/12
11/12:11/6=1/2
4) 2 7/9
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Ответ:
1) 3:1-1/2
1-1/2=1/2
3:1/2=6
2) 1-1/4:1 1/2
1-1/4=3/4
1 1/2= 3/2:3/4=2
3) 2/3+1/4:1 5/6
2/3+1/4=11/12
11/12:11/6=1/2
4) 2 7/9