中一數學-___-急急急急急急急急急急急急急急急急!!!!!!!! ×÷

1a) (+5)(-4)(-3)
=(-20)(-3)
=60

1b) (-18)÷(-3)×(-2)
=6×(-2)
=-12

1c)(-12)×(-5)÷(-10)
=60÷(-10)
=-6

1d) (+108÷(-9)÷(-4)
=.....

2a) (-4)(-7-2)
=(-4)(-9)
=36

2b) (-2+1)(17-13)
=(-1)(4)
=-4

2c) (1/5 - 3/5 )(-15)
=(-2/5)(-15)
=6

2d) (-0.5-1)÷[12-(-3)]
=(-1.5)÷15
=-0.1

3a) (-1)(+1)分之(-1)(-1)(-1)
=-1/-1
=1

3b) (-6)(+2)分之(-2)(+3)+(-4)
=-12/-10
=1.2

3c)(-14)-[(-3)+(+4)]分之(+3)(-5)(-6)
=(-14)-(1)/(3)(30)
=-15/90
=-1/6

3d)[(+3)-(-3)][(-1)-(-6)]分之(-10)-[(+5)-(-5)]
=(6)(5)/[(-10)-10]
=30/-20
=-1.5

4a) (-13)-(-4)×(-2)-(+1)
=(-13+4)×(-2-1)
=-9×-3
=27

4b) [(-13)-(-4)]×[(-2)-(+1)]
=(-13+4)×(-2-1)
=-9×-3
=27

2008-09-15 16:59:01 補充：
4a)做錯左=.=
(-13)-(-4)×(-2)-(+1)
=(-13)-8-1
=-22

2008-09-15 17:01:34 補充：
完來有好多做錯-口-
唔好跟我=3=

a) (+5)(-4)(-3) =(-20)(-3)=+60

1b) (-18)÷(-3)×(-2)=(+6)×(-2)=-12

1c)(-12)×(-5)÷(-10) =(+60)÷(-10)=-6

1d) (+108)÷(-9)÷(-4)=(-12)÷(-4)=+3

2a) (-4)(-7-2) =(-4)(-9)=+36

2b) (-2+1)(17-13)=(-1)(+4)=-4

2c) (1/5 - 3/5 )(-15)=(-2/5)(-15)=+6

2d) (-0.5-1)÷[12-(-3)]=(-1.5)÷(15)=-0.1

3a) (-1)(+1)分之(-1)(-1)(-1) =(-1)÷(-1)=+1

3b) (-6)(+2)分之(-2)(+3)+(-4)=(-12)÷(-10)=+1.2

3c)(-14)-[(-3)+(+4)]分之(+3)(-5)(-6)
=(-14)-(+1)÷(+80)=(-15)÷(+80)=-0.1875

3d)[(+3)-(-3)][(-1)-(-6)]分之(-10)-[(+5)-(-5)]
(+6)(+5)÷(-10)-(+10)=(+11)÷(-20)=-0.55

4a) (-13)-(-4)×(-2)-(+1) =(-13)-(+8)-(+1)=-22

4b) [(-13)-(-4)]×[(-2)-(+1)] =(-9)×(-3)=+27

a) (+5)(-4)(-3) =(-20)(-3)=+60

1b) (-18)÷(-3)×(-2)=(+6)×(-2)=-12

1c)(-12)×(-5)÷(-10) =(+60)÷(-10)=-6

1d) (+108)÷(-9)÷(-4)=(-12)÷(-4)=+3

2a) (-4)(-7-2) =(-4)(-9)=+36

2b) (-2+1)(17-13)=(-1)(+4)=-4

2c) (1/5 - 3/5 )(-15)=(-2/5)(-15)=+6

2d) (-0.5-1)÷[12-(-3)]=(-1.5)÷(15)=-0.1

3a) (-1)(+1)分之(-1)(-1)(-1) =(-1)÷(-1)=+1

3b) (-6)(+2)分之(-2)(+3)+(-4)=(-12)÷(-10)=+1.2

3c)(-14)-[(-3)+(+4)]分之(+3)(-5)(-6)
=(-14)-(+1)÷(+80)=(-15)÷(+80)=-0.1875

3d)[(+3)-(-3)][(-1)-(-6)]分之(-10)-[(+5)-(-5)]
(+6)(+5)÷(-10)-(+10)=(+11)÷(-20)=-0.55

4a) (-13)-(-4)×(-2)-(+1) =(-13)-(+8)-(+1)=-22

4b) [(-13)-(-4)]×[(-2)-(+1)] =(-9)×(-3)=+27

1a) (+5)(-4)(-3) =(-20)(-3)=+60

1b) (-18)÷(-3)×(-2)=(+6)×(-2)=-12

1c)(-12)×(-5)÷(-10) =(+60)÷(-10)=-6

1d) (+108)÷(-9)÷(-4)=(-12)÷(-4)=+3

2a) (-4)(-7-2) =(-4)(-9)=+36

2b) (-2+1)(17-13)=(-1)(+4)=-4

2c) (1/5 - 3/5 )(-15)=(-2/5)(-15)=+6

2d) (-0.5-1)÷[12-(-3)]=(-1.5)÷(15)=-0.1

3a) (-1)(+1)分之(-1)(-1)(-1) =(-1)÷(-1)=+1

3b) (-6)(+2)分之(-2)(+3)+(-4)=(-12)÷(-10)=+1.2

3c)(-14)-[(-3)+(+4)]分之(+3)(-5)(-6)
=(-14)-(+1)÷(+80)=(-15)÷(+80)=-0.1875

3d)[(+3)-(-3)][(-1)-(-6)]分之(-10)-[(+5)-(-5)]
(+6)(+5)÷(-10)-(+10)=(+11)÷(-20)=-0.55

4a) (-13)-(-4)×(-2)-(+1) =(-13)-(+8)-(+1)=-22

4b) [(-13)-(-4)]×[(-2)-(+1)] =(-9)×(-3)=+27

1a. (-20)(-3)=60

1b. 6(-2)=-12

1c. 60/(-10)=-6

1d. (-12)/(-4)=3

2a. (-4)(-9)=36

2b. (-1)(4)=-4

2c.(-2/5)(-15)=6

2d. (-1.5)/15=-0.1

3a. (-1)/0 no solution

3b.(-6-4)/(-12)=5/6

3c.(-15)(-6)/(-14-1)=(-90)/(-15)=6

3d. (-10-10)/(6*5)=-2/3

4a. (-13)-8-1=-22

4b. -9*(-3)=27