计算:(1)(-12)-(+8)+(-6)-(-5)(2)(-2)×(- 5 3 )-|-2 3 |-5÷6-( - 1
计算:(1)(-12)-(+8)+(-6)-(-5)(2)(-2)×(-53)-|-23|-5÷6-(-13)(3)-(a-b)-3(b-2a)(4)14(-4x2+2x...
计算:(1)(-12)-(+8)+(-6)-(-5)(2)(-2)×(- 5 3 )-|-2 3 |-5÷6-( - 1 3 )(3)-(a-b)-3(b-2a)(4) 1 4 (-4x 2 +2x-8)-( 1 2 x -1)(5) (- 1 4 ) 2 ÷ (- 1 2 ) 4 ×(-1) 8 -(1 3 8 +2 1 3 -3 3 4 )×24.
展开
(1)(-12)-(+8)+(-6)-(-5) =-12-8-6+5 =-26+5 =-21;
(2)(-2)×(- )-|-2 3 |-5÷6-( - ) =3 -8- + =2 -8 =-5 ;
(3)-(a-b)-3(b-2a) =-a+b-3b+6a =5a-2b;
(4) (-4x 2 +2x-8)-( x -1) =-x 2 + x-2- x +1 =-x 2 -1;
(5) (- ) 2 ÷ (- ) 4 ×(-1) 8 -(1 +2 -3 )×24 = ÷ ×1-1 ×24-2 ×24+3 ×24 =1-33-56+90 =91-89 =2. |
收起
为你推荐: