简算下面各题(一)1994+997*9
1、1994+997*997
=997*2+997*997
=997*(2+997)
=997*999
=997*(1000-1)
=997*1000-997*1
=997000-997
=997000-(1000-3)
=997000-1000+3
=996003
2、888*667+444*666
=444*2*667+444*666
=444*1334+444*666
=444*(1334+666)
=444*2000
=888000
3、1234*4326+2468*2837
=1234*4326+1234*2*2837
=1234*4326+1234*5674
=1234*(43...全部
1、1994+997*997
=997*2+997*997
=997*(2+997)
=997*999
=997*(1000-1)
=997*1000-997*1
=997000-997
=997000-(1000-3)
=997000-1000+3
=996003
2、888*667+444*666
=444*2*667+444*666
=444*1334+444*666
=444*(1334+666)
=444*2000
=888000
3、1234*4326+2468*2837
=1234*4326+1234*2*2837
=1234*4326+1234*5674
=1234*(4326+5674)
=1234*10000
=12340000
4、9999*1222-3333*666
=3333*3*1222-3333*666
=3333*3666-3333*666
=3333*(3666-666)
=3333*3000
=9999000。
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