Ответ:
a) -72+121=49
б)15/16+7/16=22/16=1 целая 6/16
в)2.9+24/25=3 целых 43/50
г) (6/7+5/7)/(12/7-4/7)=(11/7)/(8/7)=11/8=1 целая 3/8
д) (3/5+3/5)/(9/25+(-2/5))=(6/5)/(-1/5)=-6
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Ответ:
a) -72+121=49
б)15/16+7/16=22/16=1 целая 6/16
в)2.9+24/25=3 целых 43/50
г) (6/7+5/7)/(12/7-4/7)=(11/7)/(8/7)=11/8=1 целая 3/8
д) (3/5+3/5)/(9/25+(-2/5))=(6/5)/(-1/5)=-6