Question

40.8+(9.86-5.47)的简便计算方法？

Answer 1

可以这样来计算，40.8+10-6-0.14+0.53＝50.8-6+0.53-0.14＝44.8-0.14+0.53＝44.66-0.14＝44.52。

Answer 2

＝40.8+9.86-5.47
＝40.8+10-0.14-5.47
＝50+0.8-0.14-5-0.47
＝45+0.8-0.61
＝45+0.19
＝45.19