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0 125 5 6简便计算

125*56=125*(8*7)(把56拆分成8*7)=125*8*7(按顺序计算125乘以8得到整千数,使计算简单)=1000*7=7000 解析:125是一个特殊的数字,有固定的搭配的数字,所以就是需要找到125相乘的8,所以需要把56拆分成8乘以7,有利于简便计

125*5-6=625-6=619

125x5x6简便计算=125x(5x6)=125x30=3750

8.6*8=68.8

125x5x6; =125x30; =125x(8+20+2); =125x8+125x20+125x2; =1000+2500+250; =3500+250; =3750

12.6=12+3/5=63/533/5+0、125/12、5%=33/5+1=38/563/5-38/5=25/5=5原式=(2/15)*5=2/3

20+18-16+14-12+10-8+6-4+2-0=20+(18-16)+(14-12)+(10-8)+(6-4)+(2-0)=20+2*5=20+10=30.请采纳,谢谢.

125x444x6=(125x8)x(111x3)=1000x333=333000

8x5x125X6=8x125x5x6=1000x30=30000

0.8*0.42*0.6=0.8*0.6*0.42=0.48*0.42=(0.45+0.03)*(0.45-0.03)=0.45-0.03=(9/20)-0.0009=81/400-9/10000=(81*25-9)/10000=(9*9*25-9)/10000=9(9*25-1)/10000=9*224/10000=(9*8*7*2*2)/(8*2*625)=(9*7*2)/625=126/625

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