小学速算巧算1.,11111×999992,.999^2+19993,.0.9999×0.6+0.1111×3.64,.
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小学速算巧算
1.,11111×99999
2,.999^2+1999
3,.0.9999×0.6+0.1111×3.6
4,.99999×22222+33333×33334
1.,11111×99999
2,.999^2+1999
3,.0.9999×0.6+0.1111×3.6
4,.99999×22222+33333×33334
![小学速算巧算1.,11111×999992,.999^2+19993,.0.9999×0.6+0.1111×3.64,.](/uploads/image/z/8798630-14-0.jpg?t=%E5%B0%8F%E5%AD%A6%E9%80%9F%E7%AE%97%E5%B7%A7%E7%AE%971.%2C11111%C3%97999992%2C.999%5E2%2B19993%2C.0.9999%C3%970.6%2B0.1111%C3%973.64%2C.)
1、=11111*100000-11111
2、=999*999+999+1000=999*(999+1)+1000=999*1000+1000=(999+1)*1000
3、=0.9999*0.6+0.9999*0.4=0.9999*(0.6+0.4)
4、=33333*66666+33333*33334=33333*(66666+33334)
2、=999*999+999+1000=999*(999+1)+1000=999*1000+1000=(999+1)*1000
3、=0.9999*0.6+0.9999*0.4=0.9999*(0.6+0.4)
4、=33333*66666+33333*33334=33333*(66666+33334)