BEING asked in 科學及數學數學 · 1 decade ago

正負數高手請入,...快

我想問

(+4-8)÷(+5-7)×2-30×(-5)

=?

[-2/3-5/3-(-4/3)]×(0-1/2)-[-(-1/8)]

=?

要步驟

Thxxx

Update:

步驟要詳細

2 Answers

Rating
  • 1 decade ago
    Favorite Answer

    (+4-8)÷(+5-7)×2-30×(-5)

    =(-4.8)×2÷(+5-7)-(-150)

    =(-9.6)÷(-2)+150

    =(+4.8)+150

    =+154.8

    [-2/3-5/3-(-4/3)]×(0-1/2)-[-(-1/8)]

    =(-7/3+4/3)×(-1/2)-1/8

    =(-3/3)×(-1/2)-1/8

    =(+3/6)-1/8

    =+3/8

    2008-09-21 17:48:31 補充:

    第一題應該是這樣:

    (+4-8)÷(+5-7)×2-30×(-5)

    =(-4)×2÷(+5-7)-(-150)

    =(-9.6)÷(-2)+150

    =(+4.8)+150

    =+154

    Source(s): , Tim
  • 1 decade ago

    (+4-8)÷(+5-7)×2-30×(-5)

    = (-4)÷(-2)×2-(-150)

    = 4+150

    = 154

    [-2/3-5/3-(-4/3)]×(0-1/2)-[-(-1/8)]

    = (-1) x (-1/2) - 1/8

    = 3/8

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