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20.5%1.074%8.35×5..5的简便方法

20.5-1.074-8.35*5.5=19.426-8.35*(5+0.5)=19.426-8.35*5-8.35*0.5=19.426-41.75-4.175=-26.499

优先计算乘除,在计算加减.-26.499

20.5-1.074-8.35*5.5=20.5-1.074-45.925=-26.499

怎样简便就怎么算:20.5-1.074 +8.35*5.520.5-1.074 +8.35*5.5=19.426+45.925=65.351

20.5-17.58+5.5=20.5+5.5-17.58=26-17.58=8.42

20.5-1点074+8点35*5点五的简便运算20.5-1点074+8点35*5点五=20.5-1.074+45.925=65.351

20.5*3.45+65.5*2.05=20.5*3.45+6.55*20.5=20.5*(3.45+6.55)=20.5*10=205

原式=20.5-1.074-12.5=(20.5-12.5)-1.074=8-1.074=6.926供参考.

25*7x4x5=25*4*7*5=100*35=3500; 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

5.95/(1.2+0.5)*5=5.95÷1.7x5=3.5x5=17.5

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