怎样简便就怎样算 9/7÷11/6+2/9×6/11 5÷5/7-5/7×1/5 5/16+(7/16-1/4)÷1/2

问题描述:

怎样简便就怎样算 9/7÷11/6+2/9×6/11 5÷5/7-5/7×1/5 5/16+(7/16-1/4)÷1/2

9/7÷11/6+2/9×6/11=9/7×6/11+2/9×6/11=(9/7+2/9)×6/11=95/63×6/11=190/231(此题个人认为题目有误)
5÷5/7-5/7×1/5=5×7/5-5/7×1/5=7-1/7=6又6/7
5/16+(7/16-1/4)÷1/2=5/16+(7/16-1/4)×2=5/16+7/16×2-1/4×2=5/16+14/16-1/2=19/16-8/16=11/16
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