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4x6.32x5简便计算

4*6.32*2.5=4*2.5*6.32=10*6.32=63.2

4/17乘5简便计算4/17乘5=(4*5)/17=20/17 答

5x6十4x5=5x(6十4)=5x10=50,

原式=4x50-4x5=200-20=180

(68X32)x5=68x4x8x5=272x40=10880

4x(25x5)的简便运算=4x25x5=100x5=500

4x5.6x25=(4*2.5)*5.6=10*5.6=56

乖乖算原式=(4+0.125)x6=4x6+0.125x6=24+0.75=24.75

乘法结合律 原式= 39x(4x5)= 39x20= 780

原式=(24x5)x(4x250)=120x1000=120000.

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