www.qcfz.net > 1.25×0.7+1.25×1.2+12.5怎样简便运算?

1.25×0.7+1.25×1.2+12.5怎样简便运算?

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。 ...

1.25*0.7 +1.25*1.2 +12.5的简便 =1.25x(0.7+1.2)+12.5 =1.25x1.9+12.5 =1.25x2-1.25x0.1+12.5 =2.5+12.5-0.125 =15-0.125 =14.875

1.25×3.7+12又1/2×7.83-2又1/2 =1.25×3.7+1.25×78.3-1.25×2 =1.25×(3.7+78.3-2) =1.25×100 =125

解答如下: 7.32*3.2-2.4 =23.424-2.4 =21.024 74*0.72+4.3 =53.28+4.3 =57.28 0.8*(12.5+1.25) =0.8*12.5+0.8*1.25 =11-1 =10 5.2*10.1 =5.2*10+5.2*0.1 =52+0.52 =52.52 有疑问,请追问;若满意,请采纳,谢谢!

原式=1.25×(10+0.1)-0.69 =1.25×10+1.25×0.1-(0.7-0.01) =12.5+0.125-0.7+0.01 =12.5-0.7+(0.125+0.01) =11.8+0.135 =11.935

13+12=56 81÷95=45 (38+34)×4=412 0.9-0.26=0.64 62-35=27 8×56=623 7÷1.4=5 1.25×3×8=30 2.1+3.4=5.5 5-58÷58=4 1.01×99=99.99 1÷0.125=8故答案为:56,45,412,0.64,27,623,5,30,5.5,4,99.99,8.

0.25×40×1.25=2.5×4×1.25 =10×1.25=12.5

解:采用分配律, 原式=1.25x0.7+1.25x1.2+1.25x10 =1.25x(0.7+1.2+10) =1.25X11.9 =14.875

0.16×5﹦0.81.78+2.2=3.989.6÷0.6=161.2×0.5-0.4=0.20.7÷0.01=702.5×0.4=112-3.97=8.031.25×8÷1.25=86.6÷0.66=104÷0.8=55.37×0+4.63=4.631.6+2.4×0.3=2.32

(1)原始=1.25*8*0.8=10*0.8=8 (2)0.78*(99+1)=7.8 (3)0.7/0.5=7/5 (4)7.5+7.5*0.02=7.65 (5)(4-0.3)*(3-0.2)+12.5=22.86

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