Question

5.2×0.9＋0.9用简便方法计算

Answer 1

5.2×0.9＋0.9
=（5+0.2）x0.9+0.9
=5x0.9+0.2x0.9+0.9
=4.5+0.18+0.9
=4.5+1.08
=5.58
谢谢，请采纳

Answer 2

5.2×0.9+0.9
=5.2×0.9+1×0.9
=（5.2+1）×0.9
=6.2×0.9
=5.58
一定要把1×0.9这步写上。然后第1,2步用到了乘法结合率

Answer 3

5.2*0.9+0.9
=(5.2+1)*0.9
=6.2*(1-0.1)
=6.2-0.62
=5.58

或者类似方式很多你自己想想看，我也不知道为嘛要来回答问题，上来查个东西看到就随便写写，只是给你一个思路，方法肯定还有不同的

Answer 4

=0.9*（5.2+1）
=0.9*（6+0.2）
=0.9*6+0.9*0.2
=5.4+0.18
=5.58

Answer 5

0.9x（5.2+1）.0.9x6.2.5.58