Question

28.6+16.82+11.4+13.28怎样简便计算？

Answer 1

28.6+16.82+11.4+13.28
=(28.6+11.4)+(16.82+13.28)
=40+30.1
=70.1
备注：小数连加，观察小数部分是否能够凑整，但要注意并不是所有都能凑整，只是尽可能达到简便而已。

Answer 2

这题运用到加法的结合律
28.6+16.82+11.4+13.28
=(28.6+11.4)+(16.82+13.28)
=40+30.1
=70.1

Answer 3

直接是28.6+11.4+(16.82+13.28)=40+30=70

Answer 4

只能这样算了：28.6+16.82+11.4+13.28=(28.6+11.4)+(16.82+13.28)=40+30.1=70.1

Answer 5

28.6+16.82+11.4+13.28
＝（28.6+11.4）＋（16.82+13.28）
＝40＋30
＝70