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脱式计算,能简算的简单算,求班忙. 4.3×0.625+3...

0.625×5.8+5/8×3.2+62.5% =0.625x5.8+0.625x3.2+0.625 =0.625x(5.8+3.2+1) =0.625x10 =62.5; 2017×2015/2016 =(2016+1)x2015/216 =2016x2015/2016+1x2015/2016 =2015+2015/2016 =2015又2015/2016; (1/2+1/3+1/6)x24 =1/2x24+1/3x24+1/6x24 =1...

(1)7×(625-387)=7×238=1666;(2)200-40×3=200-120=80;(3)405×3-600=1215-600=615.

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