7.2x9.9怎么简便计算
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
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