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怎样简便就怎样算 12.5X3.2X25

把25分成4和8,4成25,8成12.5

(5X-5)+(3X+25) =8X+20, ∴∠1+∠2=(8X+20)°.

0.32可以拆分成0.4*0.8,然后12.5和0.8肯定是10啦,25和0.4肯定也是10啦,最后就是100啦。

10×25+2×25=250+50=300

53x25x2简便计算 解:采用结合律, 原式=53x25x2 =53x(25x2) =53x50 =2650

53x99x25 =53x(100-1)x25 =53x100x25-53x1x25 =(5300-53)x25 =5247×25 =131175

12.6x5╳4x2x25简便计算怎么写 =12.6x(5x2)x(4x25) =12.6x10x100 =126x100 =12600

用简便方法计算 5x56x25 =(5×14)×(4×25) =70×100 =7000

9又4分之1是9.25,5分之1是0.2,得9.25x9.8+9.25X0.2=9.25x(9.8+0.2)=9.25x10=92.5.如果你认可我的回答,请及时点击【采纳为满意回答】按钮,或在客户端右上角评价点【满意】。谢谢!你的采纳,是我前进的动力!你的采纳也会给你带去财富值的。我...

1.25x0.32x9 =1.25x0.8x0.4x9 =0.4x9 =3.6 12.5x3.2x25 =12.5x8x25x0.4 =100x10 =1000

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