kayoulayh
幼苗
共回答了14个问题采纳率:92.9% 举报
7.48/5 +2.52*0.2
=7.48*0.2+2.52*0.2
=(7.48+2.52)*0.2
=10*0.2
=2
195/11*132/12
=195÷11*132÷12
=195÷11*(12*11)÷12
=195÷11*11*12÷12
=195÷1*1
=195
7/9*14/15+7/9 /15
=7÷9*14÷15+7÷9÷15
=(7*14)÷9÷15+7÷9÷15
=(7*14+7)÷9÷15
=(7*15)÷9÷15
=7*15÷9÷15
=7÷9
=7/9
1年前
10