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21.36除0.8减12.9简便

21.36除以0.8-12.9能用简便方法吗?怎么算21.36/0.8-12.9=21.36x10/8-12.9=26.7-12.9=13.8

展开全部21.36÷0.8-12.9=21.36*5/4 - 12.9 = 5.34*5 -12.9 = 26.7 - 12.9 = 3.8

21.36÷0.8-12.9 =21.36÷4/5-12.9 =21.36*5/4-12.9 =534*5-12.9 =267-12.9 =138

=21.36/0.8-12.9=213.6/8-12.9=26.7-12.9=13.8

21.36÷0.8-12.9=21.36÷4/5-12.9=21.36*5/4-12.9=534*5-12.9=267-12.9=138

原式=21.36/(0.8*12.9) =21.36/10.32=2136/1032

21.36除0.8减12.9=26.7-12.9=13.8; 请采纳 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

12.9加21.36除以0.8简便计算12.9加21.36除以0.8=12.9+26.7=39.6没有合适的简便方法

解:21.36÷0.8-12.9=26.7-12.9=13.8

21.36÷0.8-12.9=26.7-12.9=13.8

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