Question

7.2x9.9怎么简便计算

Answer 1

7.2x9.9怎么简便计算

这道题这样算，
7.2×10-7.2×0.1=71.28，
就是这样写！

7.2X9.9用解便方法计算

7.2x9.9=7.2x（10-0.1）=72-0.72=71.28

简便计算8.2x9.9

8.2x9.9
=8.2*(10-0.1)
=8.2*10-8.2*0.1
=82-0.82
=81.18

7.2x18-7.2x9简便计算

原式
=7.2*（18-9）
=7.2*（10-1）
=72-7.2
=64.8
满意采纳奥

7.2x9.9用简便方法怎样做

7.2x9.9
解：简便计算
=7.2x（10-0.1）
=7.2x10-7.2x0.1
=72-0.72
=71.28
祝学习进步。

7.2x98简便计算

7.2x98
=7.2x(100-2)
=7.2x100-7.2x2
=720-14.4
=705.6

3.2x9.9的简便计算

3.2x9.9
=3.2x10 -3.2x0.1
=32-0.32
=31.68

简便计算:4.62x9.9+0.462

4.62x9.9+0.462

=4.62x9.9+4.62×0.1

=4.62×（9.9+0.1）

=4.62×10

=46.2

希望采纳，您的采纳是我们前进的动力

4.2x9.9+0.42简便计算

4.2x9.9+0.42
=4.2*（9.9+0.1）
=4.2*10
=42

7.2x98的简便计算

7.2x98
=7.2*（100-2）
=720-14.4
=705.6