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999乘以999加1999怎样算简便

原式 =999x999+1999 =999x999+999+1000 =999x(999+1)

1999+999×999 =1000+999+999×999 =1000+999×(1+999

解:如图

999×999+1999 =999×999+999+1000 =999×(999+1)+1000

解答过程如下: 1999+999×999 =1000+999+999×999 =1000+999×(

解析:先将1999拆分成999+1000的形式,然后利用乘法分配律计算,最后加上1000就可得出和不

1999+999×999的简便运算过程是: 1999+999×999 =1000+999+999×9

999×999+1999=1000000。 简便计算过程如下: 999×999+1999 =999×

999*999+1999 =999*999+999+1000 =999*(999+1)+1000 =

解:1999+199.9+19.99+1.999+2.111 = 1999+199.9+19.99+

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