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二点5×4.8的简便运算3种答案一样

4.8×32。5+3。25×52=4.8×32。5+32。5×5。2=(4.8+5。2)×32。5=10×32。5=325

2.1乘12.5乘4.8,该怎么简便运算的

12.5x4.8 =12.5x8x0.6 =100x0.6 =60

解:4.6*5.2+4.8*5.4 =(4.9-0.3)(4.9+0.3)+(5.1-0.3)(5.1+0.3) =4.9^2-0.3^2+5.1^2-0.3^2 =4.9^2+5.1^2-2*0.3^2 =4.9^2+5.1^2+2*5.1*4.9-2*5.1*4.9-0.18 =(5.1+4.9)^2-2*(5+0.1)*(5-0.1)-0.18 =10^2-2*(25-0.01)-0.18 =100-50+0.02-0.18 =50-0.16...

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4.8×9.5+24/5÷2/3-4.8 =4.8×9.5+4.8×1.5-4.8×1 =4.8×(9.5+1.5-1) =4.8×10 =48

能简便的要简便 3.12×4.8-14×0.2 =14.976-2.8 =12.176 56.8×0.5+0.6 =28.4+0.6 =29

可以简便运算。 5.5-4.8-0.2 =5.5-(4.8+0.2) =5.5-5 =0.5

4.8-4.8*0.5=4.8*(1-0.5)=4.8*0.5=2.4

4.8×1.08-5.68×6/5 =4.8×1.08-5.65×1.2 =1.2×(4×1.08-5.65) =-1.2×(5.65-4.32) =-1.2×1.33 =-1.596

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