Question

98.6✘98.6_98.5✘98.7怎么算

Answer 1

计算过程如下：

98.6x98.6-98.5x98.7

=98.6x98.6-(98.6-0.1)x(98.6+0.1)

=98.6x98.6-98.6x98.6-98.6x0.1+0.1x98.6+0.1x0.1

=0.1x0.1

=0.01

混合运算：

如果一级运算和二级运算，同时有，先算二级运算。如果一级，二级，三级运算（即乘方、开方和对数运算）同时有，先算三级运算再算其他两级。

如果有括号，要先算括号里的数（不管它是什么级的，都要先算）。在括号里面，也要先算三级，然后到二级、一级。

Answer 2

简便运算
98.6×98.6-98.5×98.7
=（98.5+0.1）×98.6-98.5×98.7
=98.5×98.6+0.1×98.6-98.5×98.7
=98.5×（98.6-98.7）+0.1×98.6
=98.5×（-0.1）+9.86
=-9.85+9.86
=0.01

Answer 3

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*98.6-98.6*0.1+0.1*98.6+0.1*0.1
=0.1*0.1
=0.01
请参考

Answer 4

98.6×98.6一98.5X98.7
=98.6×98.6一（98.6一0.1）X（98.6十0.1）
=98.6X98.6一98.6×98.6十0.1X0.1
=0.01

Answer 5

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