1.(-8)×(-2)+(-1)×(-8)-(-3)×(-8) 2.-21×(3-4╱7)

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1.(-8)×(-2)+(-1)×(-8)-(-3)×(-8)2.-21×(3-4╱7)1.(-8)×(-2)+(-1)×(-8)-(-3)×(-8)2.-21×(3-4╱7)1.(-8)×(-2)+

1.(-8)×(-2)+(-1)×(-8)-(-3)×(-8) 2.-21×(3-4╱7)
1.(-8)×(-2)+(-1)×(-8)-(-3)×(-8) 2.-21×(3-4╱7)

1.(-8)×(-2)+(-1)×(-8)-(-3)×(-8) 2.-21×(3-4╱7)
 

1.(-8)×(-2)+(-1)×(-8)-(-3)×(-8) 2.-21×(3-4╱7) 数独横竖9个方格填1-9数字不能重复数字1.()(2)(7)()(6)()(1)()()2.()()(4)(1)()(7)()(9)(8)3.()()(1)(8)()()()(2)()4.()(5)( ()2()()()()()8()()()8()5()1()()()1 5 8()4 6 2()2()()1 8 3()()5()()()()4()()()()8()()6 2 5 ()()()15 9 2 4 1 6 7 3 8( ()()()104 2 1 ()3 ()()()8 ()()() ()3( ) × ( )6 ------------- 1 ( )( ) 6( ) ( ) 5------------- 8 ( )( ) ( )()3( ) × ( )4 ------------- 2 ( )2 8( )1 ( ) 0------------- 3 ( ) 1 ( ) 8 8(1)(2)(3)(4) 1.(+15)+(-20)+(+28)+(-10)+(-5)+(-7) 2.(+2又3/4)+(-1又5/8)+(-5/6)+1/2 3.(-3又1/2)+(-2又1/9)+3.5+(-8/9)+1/2 4.(-1)+(+2)+(-3)+(+4)+.+(-41)+(+42) 1 1 2 3 5 8 () () () 8+(-2)+(-4)+1+1+(-3) 1,1,2,3,5,8,(),(),34,() 1.(-15)÷[4(-2)-(-5)]=?2.[4分之1-(8分之1)](-2又2分之一)[4分之1-(-8分之1)](-2又2分之一) ,不好意思.8分之一是有负 号的 七年级简便计算 要过程和结果1.(+15)+(-20)+(+28)+(-10)+(-5)+(-7)2.(+2又3/4)+(-1又5/8)+(-5/6)+1/23.(-3又1/2)+(-2又1/9)+3.5+(-8/9)+1/24.(-1)+(+2)+(-3)+(+4)+.+(-41)+(+4 1/8+(-2.4)-(3/8)-. 9()2()7()8()()()()4()()9()6()1 3()5()()()()24()()8 5()()1()()8 9 4()1 6 7()()1()()3 6()()88()()()()2()3 6()5 1 2 2 ()8 32 只填2个+和两个- (1 2 3 4 5 6 7 8=100)(8 8 8 8 8 8 8 8=1000) 7'8'9'10'(1)(2)(3) 16÷(-2)³-(-1/8)×(-4)