计算(1)(-4)-(+8)-(-5)+(-9);(2)(-5)×(-7)-5×(-6)(3) (-9)÷ 3 2 ×
计算(1)(-4)-(+8)-(-5)+(-9);(2)(-5)×(-7)-5×(-6)(3)(-9)÷32×23÷(-4)(4)(1-12-13)×(-12)(5)3+...
计算(1)(-4)-(+8)-(-5)+(-9);(2)(-5)×(-7)-5×(-6)(3) (-9)÷ 3 2 × 2 3 ÷(-4) (4) (1- 1 2 - 1 3 )×(-12) (5) 3+50÷(-2 ) 2 ×(- 1 5 )-1 .
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(1)原式=-4-8+5-9 =-12+5-9 =-7-9 =-16; (2)原式=35+30 =65; (3)原式=(-9)×
=(-6)×
=(-4)×(-
=1; (4)原式=1×(-12)-
=-12+6+4 =-2; (5)原式=3+50÷4×(-
=3+50×
=3+
=3-
=-
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