數學HELP~~~~~

2007-09-29 1:32 am

[(-2)(-2)-(+3)(+4)]÷[(-2)+(-3)]x(+2)點算???
5 5 5 5

回答 (4)

2007-09-29 1:37 am

✔ 最佳答案

[(-2)(-2)-(+3)(+4)]÷[(-2)+(-3)]x(+2)
=( 4 -12 ) / ( -6 )( 2 )
=( -8 ) / ( -12 )
= 2 / 3

參考: 自己

👍 0 👎 0

2007-09-29 2:21 am

[(-2)(-2)-(+3)(+4)]÷[(-2)+(-3)]x(+2)
=[4-12]÷[-2-3]x(2)
=[-8]÷[-5]x(2)
=1.6x2
=3.2

👍 0 👎 0

2007-09-29 1:39 am

=(4-12)÷(-5)x2
=+3.2

👍 0 👎 0

2007-09-29 1:37 am

[(-2)(-2)-(+3)(+4)]÷[(-2)+(-3)]x(+2)
=[-2-2-3+4]÷[-2-3]x(+2)
=(-3)÷(-5)x(+2)
=0.6x(+2)
=1.2

👍 0 👎 0