Question

"0.87×3.16+4.64"的简便运算方法是什么？

Answer 1

本题需要用到乘法分配律，将0.87看成1-0.13进行计算，具体算法如下：

0.87*3.16+4.64

＝3.16（1－0.13）＋4.64

＝3.16+4.64-0.13*3.16

＝7.8-0.4108

＝7.3892

Answer 2

"0.87×3.16+4.64"的简便运算方法如下：

0.87×3.16+4.64
=3.16+4.64-0.13×3.16
=7.8-0.4108
=7.3892

0.87*3.16+4.64
=(1-0.13)*3.16+4.64
=3.16-0.13*3.16+4.64
=7.8-0.4108
=7.3892

0.87*3.16+4.64=0.29×9.48+4.64
=0.29×（10-0.5-0.02）+4.64
=2.9-0.145-0.0058+4.64
=7.54-0.1508
=7.3892

Answer 3

0.87*3.16+4.64=3.16+4.64-0.13*3.16=7.8-0.4108=7.3892 打字不易，如满意，望采纳。