计算(1)(-3)+(-4)-(+11)-(-9)(2) -0.5-(-3 1 4 )+2.75-7 1 2 ;(3) (
计算(1)(-3)+(-4)-(+11)-(-9)(2)-0.5-(-314)+2.75-712;(3)(12+56-712)×(-36)(4)-14-(-512)×41...
计算(1)(-3)+(-4)-(+11)-(-9)(2) -0.5-(-3 1 4 )+2.75-7 1 2 ;(3) ( 1 2 + 5 6 - 7 12 )×(-36) (4) - 1 4 -(-5 1 2 )× 4 11 +(-2 ) 3 ÷|- 3 2 +1| .
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(1)(-3)+(-4)-(+11)-(-9) =-3-4-11+9 =-18+9 =-9; (2) -0.5-(-3
=(-0.5-7
=-8+6 =-2; (3) (
=-
=-18-30+21 =-27; (4) - 1 4 -(-5
=-1+2-8÷|-9+1| =-1+2-8÷8 =-1+2-1 =0. |
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