Ответы на вопрос:
1) (2/3+1/2): (5/6-1/4)=2 1. 2/3+1/2=4/6+3/6=7/6 2. 5/6-1/4=10/12-3/12=7/12 3. 7/6: 7/12=7/6*12/7=2 2) (1/4-2/15): (5/12-2/5)=7 1. 1/4-2/15=15/60-8/60=7/60 2. 5/12-2/5=25/60-24/60=1/60 3. 7/60: 1/60=7/60*60/1=7
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