谁会做1996+1997+1998+1999+2000+2001的简算
问题描述:
谁会做1996+1997+1998+1999+2000+2001的简算
答
(1996+2001)*3=11991
答
(2000-4)+(2000-3)+(2000-2)+(2000-1)+2000+2000+1=6*2000-9
答
原式=(2000-4)+(2000-3)+(2000-2)+(2000-1)+2000+(2000+1)
=6x2000-(4+3+2+1-1)
=12000-9
=11991
答
1996+1997+1998+1999+2000+2001
=2000×6-4-3-2-1+1
=12000-9
=11991
答
1996+1997+1998+1999+2000+2001
=2000-4+2000-3+2000-2+2000-1+2000+2000+1
=2000X6+(-4-3-2-1+1)
=12000-9
=11991
答
1996+2001=3997
1997+2000=3997
1998+1999=3997
3997+3997+3997=4000X3-9=11991
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