(-2)+4+(-6)+8+(-10)+12+(-14)+……+2008
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(-2)+4+(-6)+8+(-10)+12+(-14)+……+2008
(-2)+4+(-6)+8+(-10)+12+(-14)+……+2008
(-2)+4+(-6)+8+(-10)+12+(-14)+……+2008
((-2)+4)+((-6)+8)+((-10)+12)+((-14)+……+2008)
=2*(2008/4)
=1004
1004
2008
8,10,12,6,4,2,( ),( ),( )
10,1,8,1,6,2,4,6,2,().
2+(-4)+6+(-8)+10+(-12)+...+994+(-996)+998+(-1000)=?
找规律:2/1、4/3、8/8、8/10、4/6( )、()、4/9
2,3,4,6,6,9,8,( 12 ),( 10
找规律2,1,4,2,6,4,8,8,10,16,()()
(-2)+4+(-6)+8+(-10)+12+(-14)+……+2008
省略加号的计算:1.(-8)-(-10)+(-6)-(+4) 2.14+(-4)-2-(-26)-3
X=8(11-10)+4(10-6)+6*2解方程
根据数字猜成语2,4,6,8,10( )
0 2 4 6 8 10(打一成语)
2、4、6、8、10、 (猜一成语)
偶数2,4,6,8,10 .都是合数( )判断
3,6,8,8,4,2,8,() A.6 B.8 C.10 D.12
()1()2()3()4()5()6()7()8()9()10=-10(括号里只能填+、-号)
2 4 4 6 8 8 10 ( )( )后边两个数字是?
(2,4),(3,6),(5,8),(7,9),(11,10),( ).行测题
计算题:(1)(-12)+(+12)-(-6) (2)【(-5)-(+9)】-(-4) (3)8计算题:(1)(-12)+(+12)-(-6)(2)【(-5)-(+9)】-(-4)(3)8-(9-10)(4)(3-4)-(6-10)只要算式,