Anonymous
Anonymous asked in 科學及數學數學 · 9 years ago

關於數學問題 [20點!]

1.(-2)÷(-6)

2.(-8)×(-2)×(+9)

3.If x= -3 and y =2, find the values of the following:

a)4xy

Update:

要step-_-

3 Answers

Rating
  • 9 years ago
    Favorite Answer

    1.(-2)÷(-6)

    = 三分之一 (因為第一條係÷數,只可以同你講負負得正,係唔會有step。)

    2.(-8)×(-2)×(+9)

    =(+16)x(+9)

    =+144

    3. x=-3 y=2 <------------呢個要唔要都得,只不過保障D

    4x(-3)x2

    =(-12)x2

    =-24

    希望幫到你=]

    Source(s): 自己
  • 9 years ago

    1. 1/3 or 0.333333333333333

    2. 144

    3. -24

    Source(s): me
  • 9 years ago

    1.1/3(3分1)

    2.144

    3.-24

    Source(s): me
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