计算:(1)(-9)-(-7)+(-6)-(+4)-(-5)(2) -24÷(- 3 2 )+6×(- 1 3 ) (3
计算:(1)(-9)-(-7)+(-6)-(+4)-(-5)(2)-24÷(-32)+6×(-13)(3)(34-56+712)÷(-136)(4)-12012-(-51...
计算:(1)(-9)-(-7)+(-6)-(+4)-(-5)(2) -24÷(- 3 2 )+6×(- 1 3 ) (3) ( 3 4 - 5 6 + 7 12 )÷(- 1 36 ) (4) - 1 2012 -(-5 1 2 )× 4 11 +(-2 ) 3 ÷|- 3 2 +1| .
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(1)(-9)-(-7)+(-6)-(+4)-(-5) =(-9)+7+(-6)+(-4)+5 =[(-9)+(-6)+(-4)]+(7+5) =(-19)+12 =-(19-12) =-7; (2) -24÷(-
=-24×(-
=16+(-2) =14; (3) (
= (
=
=(-27)-(-30)+(-21) =-18; (4) - 1 2012 -(-5
=-1-(-
=-1+2+(-1) =0. |
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