幫我計下而幾條數~~

2007-08-05 7:31 am
(-27)+(-19)=
23-(-30)=
(-19)-(-40)=
(-14)+20=
32+(-18)=
-(25)+16=
(-88)-(-21)=
(-7)*(+4)-(-14)=
(-12)+(-52)/(+4)=
(-32)/(+4)*(-15)=
(-8)*(-3)-(-15)=
唔好意思啊!~一次問甘多題~!不過我都系唔識啊~~
同埋你地講埋而d()要點計先得啊~~
有時又-(-?)有兩個負bo~~而又d姐系點~~~

回答 (3)

2007-08-05 8:01 am
✔ 最佳答案
(-27)+(-19)=(-27)-19= - 46
23-(-30)=20+30=53
(-19)-(-40)=-19+40=21
(-14)+20=20-14=6
32+(-18)=32-1814
-(25)+16=16-25= - 9
(-88)-(-21)= -88+21= - 67
(-7)*(+4)-(-14)=-28+14= - 14
(-12)+(-52)/(+4)=-12+(-13)=-12-13= - 25
(-32)/(+4)*(-15)=(-8)*(-15)=120
(-8)*(-3)-(-15)=24+15=39
有兩句野係要記下啊:
負負得正: 即係兩個負號就會變正號 eg: - ( -3)=+3, ( - 8) * ( -3)=+24, ( -8)/( -4)=2....
負正得負: eg: 3*( -2)= -6 , ( -6)/(3)= -2 , - 6 + 8 = 8 - 6 = 2 ........
2007-08-05 8:12 am
你記得,負負=正,負正=負,正正=正就可以了
(-27)+(-19)=-27-19=-46
23-(-30)=23+30=53
(-19)-(-40)=-19+40=40-19=21
(-14)+20=-14+20=20-14=6
32+(-18)=32-18=14
-(25)+16=-25+16=16-25=-9
(-88)-(-21)=-88+21=21-88-67
(-7)*(+4)-(-14)=-28+14=-14
(-12)+(-52)/(+4)=-12-13=-25
(-32)/(+4)*(-15)=-8*(-15)=8*15=120
(-8)*(-3)-(-15)==24+15=39
2007-08-05 7:50 am
(-27)+(-19)=-46
23-(-30)=53
(-19)-(-40)=21
(-14)+20=6
32+(-18)=14
-(25)+16=-9
(-88)-(-21)=-67
(-7)*(+4)-(-14)=-14
(-12)+(-52)/(+4)=-16
(-32)/(+4)*(-15)= - 8/15
(-8)*(-3)-(-15)=39


記住:
負負得正
6+ 5 = 11
個 11 係點出來?
你可以睇6 - 5 成為 6 - (-5) , 兩個小一齊 , 就變加 ,
至於忝除 , 兩個負乘埋就變加 , 兩個負相除亦變加,
例如 : (-3)(-3) = 9

仲有其他都係一樣 ,
負負得正
負正得負
正正得正


收錄日期: 2021-04-13 18:00:41
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