(2005+2006+2007+2008+2009+2010+2011)÷20081.(2005+2006+2007+2008+2009+2010+2011)÷20082.20092009x2008与20082008x2009的结果相差多少?3.计算:9999x2222+3333x3334
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/15 07:33:56
(2005+2006+2007+2008+2009+2010+2011)÷20081.(2005+2006+2007+2008+2009+2010+2011)÷20082.20092009x2008与20082008x2009的结果相差多少?3.计算:9999x2222+3333x3334
(2005+2006+2007+2008+2009+2010+2011)÷2008
1.(2005+2006+2007+2008+2009+2010+2011)÷2008
2.20092009x2008与20082008x2009的结果相差多少?
3.计算:9999x2222+3333x3334
(2005+2006+2007+2008+2009+2010+2011)÷20081.(2005+2006+2007+2008+2009+2010+2011)÷20082.20092009x2008与20082008x2009的结果相差多少?3.计算:9999x2222+3333x3334
1. ((2005+2011)+(2006+2010)+(2007+2009)+2008)/2008
=(2*2008+2*2008+2*2008+2008)/2008
=7*2008/2008
=7
2.2009*10001*2008-2008*10001*2009
=2009*2008*(10001-10001)
=0
3.3333*3*2222+3333*3334
=3333*(6666+3334)
=33330000
1.原式=(2008×7 -3-2-1+1+2+3)÷2008
=2008×7÷2008
=7
2.两式乘积相等,(20082008+10001)*2008=20082008*(2008+1) 10001*2008=20082008 20082008-20082008=0 3. 9999×2222+3333×3334 =3333×3×2222+3333×3334 =3333×6666+3333×3334 =3333×(6666+3334) =3333×10000 =33330000
1.观察2005+2006+2007+2008+2009+2010+2011
发现2005+2011=2*2008 2006+2010=2*2008 2007+2009=2*2008
那么 2005+2006+2007+2008+2009+2010+2011=7*2008
1,7
2,计算器0
3,33330000
1.(2005+2006+2007+2008+2009+2010+2011)÷2008
=(2008-3+2008-2+2008-1+2008+2008+1+2008+2+2008+3)/2008
=[2008*7+(-3-2-1+0+1+2+3)]/2008=7
2.20092009x2008-20082008x2009
=(20082008+10001)-200...
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1.(2005+2006+2007+2008+2009+2010+2011)÷2008
=(2008-3+2008-2+2008-1+2008+2008+1+2008+2+2008+3)/2008
=[2008*7+(-3-2-1+0+1+2+3)]/2008=7
2.20092009x2008-20082008x2009
=(20082008+10001)-20082008(2008+1)
=20082008*2008+10001*2008-20082008*2008-20082008
=10001*2008-20082008
=20082008-20082008
=0
3.9999x2222+3333x3334
=1111*9*1111*2+1111*3*(1111*3+1)
=1111^2*18+1111^2*9+1111*3
=1111^2*27+1111*3
=1111*3(1111*9+1)
=3333*10000
=33330000
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