負數點計``??教下我丫~

*******相加同相減:::

負負得正:::::::::: (-) (-) = (+)

負負得正例:: (-3)-(-4)= (-3)+4= +1

正正得正:::::::::(+) (+) = (+)

正正得正例::(+1)+(+3)= (+1)+3= +4


負正得負:::::::::(+) (-) = (-)

負正得負例::(+5)-(+4)= (+5)-4= +1


正負得負:::::::::(+) (-) = (-)

正負得負例::(+5)+(-4)= (+5)-4= +1





*********乘同除::::

負 負 得 正
負負得正姐係::(-2) × (-5) = +10
(-10) ÷ (-5) = +2

正 正 得 正
正正得正姐係::(+4) × (+3) = +12
(+20) ÷ (+4) = +5


負 正 得 負
負正得負姐係:: (-2) × (+3) = (-6)
(-10) ÷ (+2) = (-5)


正 負 得 負
正負得負姐係::(+3) × (-2) = (-6)
(+20) ÷ (-10) = (-2)


!!!!!!!!!!!!!!!!!!!!負正得負同正負得負係1樣既..!!!!!!!!!!!!



好似亂左少少``希望你明=]

you should read more maths books to enhance you mathemathical knowledge.
also you should do more exercise then you will learn.

其實最好就禁計數機...
我雖然自己吾算好叻,但平時刀可以教到人
要嚮度教真系好難,因為我講刀系吾知你明吾明,
建2你問同班同學.

例:
(-1)+(-2)=3 ←呢個係負負得正
(-3)x(-2)=6 ←呢個都係負負得正
(-6)除(-2)=3 ←呢個都係負負得正

(-1)-(-2)=3 → (-1)+2=1 ←留意,呢個係負2同前面個負號成負負得正

記住:
正正得正
正負得負
負正得負
負負得正

識呢d 4則混算都唔會有大問題

乘除 2個都係負數=正
2個都係正數=正
一個正一個負=負

you should list out your question , otherwise difficult to teach u here