Question

0.999×10.4-0.111×3.6怎样简便运算？

Answer 1

简便计算如下：

0.999×10.4-0.111×3.6

=0.999×10.4-0.111×9×0.4

=0.999×10.4-0.999×0.4

=（10.4-0.4）×0.999

=10×0.999

=9.99

Answer 2

简便计算
0.999×10.4－0.111×3.6。
解析:
本题简便计算中涉及数字没有重复的，但有关联性较强的数0.999和0.111，我们知道0.999=0.111×9，所以可以由此将前后两个数化成同一个数后，再考虑用乘法分配率计算。
解答:
原式=0.111×9×10.4－0.111×3.6
=0.111×(9×10.4)－0.111×3.6
=0.111×93.6－0.111×3.6
=0.111×(93.6－3.6)
=0.111×90
=1.11×9
=9.99。

Answer 3

解:简便计算方法如下
0.999×10.4-0.111×3.6
=0.999×10.4-0.111×9×0.4
=0.999×10.4-0.999×0.4
=0.999×（10.4-0.4）
=0.999×10
=9.99

Answer 4

0.999×10.4-0.111×3.6
=0.999×10.4-0.111×9×0.4

=0.999×10.4-0.999×0.4
=0.999×(10.4-0.4）
=0.999×10
=9.99