39×9/14÷13/14÷18=?9/20×1/2+19/20÷2=?(1/4+1/3÷1/2)÷1/5=?脱式怎么计算?
更新时间:2026-10-01 01:19:38
问题描述:
39×9/14÷13/14÷18=?9/20×1/2+19/20÷2=?(1/4+1/3÷1/2)÷1/5=?脱式怎么计算?
刘英华回答:
39×9/14÷13/14÷18=39×9/14×14/13×1/18(39和13约分,9和18约分,14和14约分)=3/2=1.59/20×1/2+19/20÷2=9/20×1/2+19/20×1/2=(9/20+19/20)×1/2=7/5×1/2=7/10(1/4+1/3÷1/2)÷1/5=(1/4+2/3)÷1...
