Ответ:
7/12-1/3:1/2-2/5=1/4:1/10=2.1/2
3/5-4/15:3/4-1/2=1/3:1/4=1.1/3
1/8+1/4:5/6+2/3=3/8:1.1/2=1/4
7/18+1/6:2.1/2+5/6=5/9:3.1/3=1/6
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Ответ:
7/12-1/3:1/2-2/5=1/4:1/10=2.1/2
3/5-4/15:3/4-1/2=1/3:1/4=1.1/3
1/8+1/4:5/6+2/3=3/8:1.1/2=1/4
7/18+1/6:2.1/2+5/6=5/9:3.1/3=1/6