Question

5.4×4.6+0.54×5.4的简便算法

Answer 1

5.4×4.6+0.54×5.4
=(5+0.4)×(5-0.4)+(5+0.4)×(5+0.4)/10
=25-0.16+(25+2×5×0.4+0.16)/10
=25-0.16+(25+4+0.16)/10
=25-0.16+2.9+0.016
=27.756
就这么简单哈

Answer 2

5.4×4.6+0.54×5.4
=(5+0.4)×(5-0.4)+(5+0.4)×(5+0.4)/10
=25-0.16+(25+2×5×0.4+0.16)/10
=25-0.16+(25+4+0.16)/10
=25-0.16+2.9+0.016
=27.756

Answer 3

5.4×4.6+0.54×5.4的简便算法
回复：首先，题目应该有点小错误吧。0.54应该是5.4才对吧？如果是的话，那么，这道题的简便算法如下：
5.4x(4.6+5.4)=5.4x10=54

Answer 4

5.4×4.6+0.54×5.4
=5.4*(4.6+0.54)
=5.4*5.14=27.756

Answer 5

5.4*(4.6+0.4)+5.4*0.14
=5.4*5+5.4*0.1+5.4*0.04
=27+0.54+0.216
=27.756