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2.1*12.5*4.8简便算

2.1×12.5×4.8 =(2.1×6)×(12.5×0.8) =12.6×10 =126 你好,本题已解答,如果满意,请点右上或下角“采纳答案”,支持一下。

没有简便

2.1乘以12.5乘以4.8 =2.1×12.5×(8×0.6) =(2.1×0.6)×(12.5×8) =1.26×100 =126

7.5x2.3+1.9x2.5+12.5x0.4 =2.5x3x2.3+1.9x2.5+2.5x5x0.4 =2.5x(6.9+1.9+2) =2.5x10.8 =2.5x(10+0.8) =2.5x10+2.5x0.8 =25+2 =27

1.25×0.7+1.25×1.2+12.5=1.25x(0.7+1.2+10)=1.25x11.9=1.25x12-1.25x0.1=1.25x4x3-0.125=5x3-0.125=15-0.125=14.875 简便计算是一种特殊的计算,它运用了运算定律与数字的基本性质,从而使计算简便,使一个很复杂的式子变得很容易计算出得数。 ...

0.125*153+12.5*0.25+1.25*2.1 =1.25×15.3+1.25×2.5+1.25×2.1 =1.25×(15.3+2.5+2.1) =1.25×19.9 =1.25×(20-0.1) =1.25×20-1.25×0.1 =25-0.125 =24.875

7.5*2.3+1.9*2.5+12.5*0.4 =2.5*3*2.3+1.9*2.5+2.5*5*0.4 =2.5*(6.9+1.9+2) =2.5*10.8 =2.5*(10+0.8) =2.5*10+2.5*0.8 =25+2 =27

12.5×1.1怎么简便运算 12.5×1.1 =12.5×(1+0.1) =12.5×1+12.5×+0.1 =12.5+0.125 =12.625

5x(4/15+1/12)-5/12 =5x4/15+5x1/12-5/12 =4/3+5/12-5/12 =4/3

解:(1/8)/12.5x(2/3+0.5) =1/8/(25/2)x(2/3+1/2) =1/8x2/25x7/6 =7/600 =0.01166 =0.01170 答:答案是0.01170。

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