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125x25x(40+8)的简便方法

125x25x(40+8) =125x25x40+125x25x8 =125x(25x4x10)+(125x8)x25 =125x1000+25x1000 =(125+25)x1000 =150x1000 =150000

解:原式=25x40x125+25x8x125 =1000x125+25x1000 =125000+25000 =150000 分析:主要考察结合律的运用。

=25✖️40+25✖️8-25✖️20=1000+200-500=700

125x25x(8十40)求解 125x25x(8十40) =(125*8*25)+(125*25*40) =25*1000+125*1000 =25000+125000 =15000

25x(40十8)x125 =25x40x125十25x8x125 =1000x125十25x1000 =1000x(125十25) =1000x150 =150000

解法一: 25×(40+8)×125 =(1000+200)×125 =1200×125 =1200×500/4 =300×500 =150000 解法二: 25×(40+8)×125 =25×40×125+25×8×125 =1000×125+25×1000 =1000×(125+25) =1000×150 =150000

(40-8)×125 =32x125 =4x8x125 =4x1000 =4000

(40+8)*125 =40x125+8x125 =5000+1000 =6000 朋友,请及时采纳正确答案,下次还可能帮您,您采纳正确答案,您也可以得到财富值,谢谢。

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