几道小学简便运算

题目

几道小学简便运算
7.48/5 +2.52*0.2
195/11*132/12
7/9*14/15+7/9 /15

答案

7.48/5 +2.52*0.2
=7.48*0.2 +2.52*0.2
=0.2(7.48+2.52)=2
195/11*132/12
=195/11*(12*11)/12
=195

7/9*14/15+7/9 /15
=7/9(14/15+1/15)
=7/9