Question

小学数学。大家帮帮忙。

2/9X3/8+0.375+7/9X37.5 用简便运算。谢谢，

Answer 1

九分之二乘八分之三加八分之三加九分之七乘37.5
（九分之二+九分之七）乘（八分之三＋八分之三）乘37.5
1乘八分之六乘37.5
八分之二百二十五
如果不是要求的简便运算，就别简便了，反而麻烦些。

Answer 2

2/9X0.375+0.375+7/9X0.375X10
=（2/9+1+7/9X100）X0.375
=711/9X3/8
=237/8

Answer 3

原式=3/8X(2/9+1+7/9X100)=3/8X711/9=3/8X9=3/8X(80-1)=30-3/8=237/8

Answer 4

2/9×3/8+0.375+7/9×37.5
=2/9×3/8+3/8+7/9×3/8×100=3/8×(2/9＋1＋700/9)=3/8×711/9=237/8

Answer 5

2/9X3/8+0.375+7/9X37.5
=(2/9+1+7/9X100)X3/8
=(11/9+700/9)X3/8
=102X3/8
=153/4