25*6.4*12.5 (3-1/4-5/12)÷2/3 3.25*5.8+67.5*0.58 5/7÷(7-6*2/3
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/28 02:23:17
25*6.4*12.5 (3-1/4-5/12)÷2/3 3.25*5.8+67.5*0.58 5/7÷(7-6*2/3)
怎样简便就怎样算
怎样简便就怎样算
25*6.4*12.5
=(25x4x4)x(0.8x12.5)
=400x10
=4000
(3-1/4-5/12)÷2/3
=3x3/2-1/4x3/2-5/12x3/2
=9/2-3/8-5/8
=9/2-1
=7/2
3.25*5.8+67.5*0.58
=(3.25+6.75)x5.8
=10x5.8
=58
5/7÷(7-6*2/3)
=5/7÷(7-4)
=5/7÷3
=5/21
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=(25x4x4)x(0.8x12.5)
=400x10
=4000
(3-1/4-5/12)÷2/3
=3x3/2-1/4x3/2-5/12x3/2
=9/2-3/8-5/8
=9/2-1
=7/2
3.25*5.8+67.5*0.58
=(3.25+6.75)x5.8
=10x5.8
=58
5/7÷(7-6*2/3)
=5/7÷(7-4)
=5/7÷3
=5/21
请好评
如果你认可我的回答,敬请及时采纳,
~如果你认可我的回答,请及时点击【采纳为满意回答】按钮~
~手机提问的朋友在客户端右上角评价点【满意】即可.
~你的采纳是我前进的动力~~
O(∩_∩)O,记得好评和采纳,互相帮助
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