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25x2x4简便算法

25×19×4×2 =(25×4)×(19×2) =100×38 =3800 你好,本题已解答,如果满意 请点右下角“采纳答案”。

45X25X2X4 =45*2*(25*4) =90*100 =9000

首先25*4=100然后125*8=1000最后50*2=100最终100+100+1000=1200

(30×25)×2×4 =(30×2)×(25×4) =60×100 =6000

25×35×4×2 =25×4×(35×2) =100×70 =7000

25x33x4 =33x(25x4) =33x100 =3300 朋友,请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

1先25乘4然后再从45答案等于4500 2 先把扩号去了,然后250乘4,然后在乘57 3列式为125×8×25×20,答案等于50万

2.25x4.8+77.5x0.48 =2.25x4.8+7.75x4.8 =4.8x(2.25+7.75) =4.8x10 =48

2.8x1.7x4.5=21.42 运用拆分法将2.8分为3-0.2,通过计算得: 2.8x1.7x4.5 =(3-0.2)x1.7x4.5 =3x1.7x4.5-0.2x1.7x4.5 =3x1.7x4.5-0.9x1.7 =1.7x0.9x(3x5-1) =1.7x0.9x14 =1.7x14x(1-0.1) =(2-0.3)x14x(1-0.1) =(28-4.2)x(1-0.1) =2...

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