(-4)-(+9)=-13

2007-08-01 5:31 am
(-4)-(+9)=-13

點解答案等於-13

回答 (7)

2007-08-01 5:35 am
✔ 最佳答案
-4-9=13

因為負正得負
2007-08-01 5:12 pm
(-4)-(+9)=-13
-4-(+9)=-13
-4-9=-13

-4-9=-13 因為-4減去-9就等於

你係-4減9,就向後退9
2007-08-01 6:36 am
咁樣解釋會晤會清楚 D:

我本來已經綠左四萬元卡數(欠銀行$ 用-4表示),之後見到架車好正,又錄卡用左九萬元(減一個正數 9萬)!

到月尾收到既月結單要『還』幾多錢?

2007-08-14 02:48:51 補充:
請注意:答案寫的有點兒問題!應該是 -13!
2007-08-01 5:54 am
(-4)-(+9)=-13
睇中間o既「-」...你就要將後面括號內o既符號變成另外一個符號...(+變-.....-變+)
之後你就計...
(-4)-9
見到中間有個「-」..你就要將-4再向後數9格..(-5..-6..-7..-8..如此類推,一直數9個數字)
之後答案就=-13
參考: me
2007-08-01 5:45 am
10< -9< -8< -7< -6< -5< -4< -3< -2< -1<0> 1> 2> 3> 4> 5> 6> 7> 8> 9> 10

(-4)-(+9) = (-4) - (9)

u have loss 4 oranges already, and now loss more 9 oragnes
total loss (4+9) oranges
so total loss 13 oranges

if (-4) - (-9) >>>>> it will be= (-4) +9
answer will be 5.
because "-" "-" = "+"
2007-08-01 5:43 am
因為(-正得正) (-4)-(+9)係-正係- so會變左-(-4)+(+9)啦 4+9係13 而頭個num係 - so ans都會係-
2007-08-01 5:37 am
(-4)-(+9)=-13

因為負負得正....
所以負4減負9=負13

2007-07-31 21:38:08 補充:
負正得負呀~


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