數學高手請進!

2007-05-30 11:04 pm
請數學高手們回答我以下問題:

3x(-3)+(-3)x(-5)-2x3x(-5) 3x(-3)
一一一一一一一一一一一 再減 一一一
5-(-6)+3 -5



ps: 一一一一 等於除

請回答! 快! 唔該晒~
更新1:

sorry,,,,係再再減 3x(-3)÷(-5) sorry, 打得唔清楚

回答 (2)

2007-05-30 11:26 pm
✔ 最佳答案
係咪問

3x(-3)+(-3)x(-5)-2x3x(-5).........................3x(-3)
---------------------------------------- - --------------------
5-(-6)+3..................................................-5

-9 + 15 -(-30) ............................... -9
--------------------------------- - --------------------
5+6+3...................................................-5

36.............9
------- - --------
14.............5

36(5) - 9(14)
---------------------
14(5)

27
----
35
2007-06-01 4:46 am
 3x(-3)+(-3)x(-5)-2x3x(-5)   3x(-3)
 一一一一一一一一一一一 減---
     5-(-6)+3      -5
  (-9)+15-2x(-15)   -9
= --------------------- - ----
   -1+3      -5

  6-(-30)   -9
= ---------- -  -----
   2    -5

  -24    -9
= --------- - ----
   2    -5
  120    18
= -------- - ------
  10    10
  102
= -------
  10
  51
= ------
  5
 =====


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