Question

98.6*98.6-98.5*98.7简便计算怎么算啊？

Answer 1

98.6*98.6-98.5*98.7 简便计算方法如下

1、提取算式如下：

    98.6×98.6-98.5×98.7

2、简便计算过程：

=98.6×98.6-98.5×98.6-98.5×0.1

=98.6×（98.6-98.5)-9.85

=98.6×0.1-9.85

=9.86-9.85

=0.01

3、计算结果：0.01

4、以上谢谢，期待您的采纳！

Answer 2

98.6*98.6-98.5*98.7
=98.6^2-(98.6-0.1)*(98.6+0.1)
=98.6^2-(98.6^2-0.1^2)
=0.1^2=0.01

Answer 3

98.6×98.6-98.5×98.7
=98.6²-(98.6-0.1)×(98.6+0.1)
=98.6²-(98.6²-0.1²)
=98.6²-98.6²+0.1²
=0.1²
=0.01

Answer 4

98.6×98.6-98.5×98.7
=98.6×98.6-（98.6-0.1）×（98.6+0.1）
=98.6×98.6-（98.6×98.6+9.86-9.86-0.01）
=98.6×98.6-98.6×98.6-9.86+9.86+0.01
=0.01
这样计算最简便

Answer 5

98.6×98.6-(98.6-0.1)×(98.6+0.1)
=98.6²-(98.6²-0.1²)
=98.6²-98.6²+0.1²
=0.1²
=0.01