www.rnxh.net > 6.4+3.6x5.2能简便吗?

6.4+3.6x5.2能简便吗?

能否简便要看是否有公因素。 6.4=8x0.8 3.6=4x0.9 5.2=2x2.6 所以 6.4+3.6x5.2 =8x0.8+4x0.9x2x2.6 =8x(0.8+0.9x2.6) =8x(0.8+2.34) =8x3.14 =25.12 其实还不如直接计算 6.4+3.6x5.2 =6.4+18.72 =25.12 随你喜欢,爱用哪种就用哪种。

6.4+3.6x5.2 =8x(0.8+2.34) =8x3.14 =25.12 求采纳!!

3.6+6.4+5分之4+3又5分之4 =10+4.8 =14.8 3又7分之2-1又9分之2+6又7分之五-3又9分之7 =(3又7分之2+6又7分之五)-(1又9分之2+3又9分之7) =10-5 =5 12.5*(80-8+0.8) =12.5*80-12.5*8+12.5*0.8 =1000-100+10 =910 3x-2.4=6.6 3x=9 x=3 (x-2)/1...

运用分配律简便

6.4÷0.5÷2 =6.4÷(0.5×2) =6.4÷1 =6.4 1.6÷0.04÷0.16 =1.6÷0.16÷0.04 =10÷0.04 =250 1.8÷[0.6x(4-2.5)] =1.8÷[0.6x1.5] =1.8÷0.9 =2

(1)4×3.75+0.25=4×4=16=0(×)改正:4×3.75+0.25=15+0.25,=15.25;(2)6.4+3.6×5.3=10×5.3=53(×)改正:6.4+3.6×5.3=6.4+19.08=25.48;(3)15.8-0.8×2=15×2=30(×)改正:15.8-0.8×2=15.8-1.6,=14.2;(4)4.5×0.9+6.8=4.05+6.8=4.73.(...

3.6加6.4除以2·5什样用简便方法 3.6加6.4除以2·5 =3.6+2.56 =6.16 直接计算

8x(x-5.2)=6.4 x-5.2=6.4÷8 x-5.2=0.8 x=0.8+5.2 x=6

25X23X4=(25×4)×23=100×23=2300 5.17-1.8-3.2=5.17-(1.8+3.2)=5.17-5=0.17 3.27十6.4十2.73十4.6=(3.27+2.73)+(6.4+4.6)=6+11=17

5、5x17、3+6、4÷3、2 =(5+0、5)x17、3+2 =5x17、3+0、5x17、3+2 =86、5+8、65+2 =86、5+8、5+0、15+2 =97、15

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