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10.1 5.5的简便运算

10.1x55简便算法10.1x55=55*(10+0.1)=55*10+55*0.1=550+5.5=555.5

=(10+0.1)乘以55 =10乘以55+0.1乘以55 =550+5.5 =555.5

10.155简便运算=(10+0.1)x55=10x55+0.1x55=550+5.5=555.5

=(101-1)*1/5=100*1/5=20

5.5/9.9=(5.5/1.1)/(9.9/1.1) =5/9

5.5*10.1=5.5*(10+0.1)=5.5*10+5.5*0.1=55+0.55=55.55

4.6x202+10.1x5.5 =4.6x101x2+10.1x5.5 =4.6x10.1x10x2+10.1x5.5 =92x10.1+10.1x5.5 =(92+5.5)x10.1 =942.75 =(92+5.5)x10.1 =97.5*(10+0.1) =97.5*10+9.75 =984.75 上面错了,真不好意思哦

这样

5.5X9.8 =5.5X(10-0.2) =55-1.1 =53.9

99.9+0.1+2x5+5.5

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