(+2)+(+5)=
(+7)+(-4)=
3+(-4)=
10+(-4)=
(+4)+(+5)=
(-5)+(+3)=
(-11)+(6)=
6+(-44)=
-13+(35)+(-3)=
-5+(-8)+10=
(+3)-(-2)=
(+9)+(-5)=
1-(-2)=
5-(-4)=
(-1)-(+2)=
(-12)-(-13)=
-7+(-3)=
(-6)-13=
(+4)-(+5)+(-2)=
(-4)+(-6)-(-5)=
2-(-4)+(-3)=
(-3)-2-(-4)=
(-3)-(-8)-(+4)=
-12+3-(-3)=
教下我..希望完整答
唔識做..教下..
2007-09-13 5:01 am
回答 (7)
2007-09-13 5:26 am
(+2)+(+5)=
=2+5
=7
(+7)+(-4)=
=7-4<---正負得負
=3
3+(-4)=
=3-4<----正負得負
=-1
10+(-4)=
=10-4<---正負得負
=6
(+4)+(+5)=
=4+5
=9
(-5)+(+3)=
=-5+3
=-2
(-11)+(6)=
=-11+6
=-5
6+(-44)=
=6-44<----正負得負
=-38
-13+(35)+(-3)=
=-13+35-3<---正負得負
=22-3
=19
=2+5
=7
(+7)+(-4)=
=7-4<---正負得負
=3
3+(-4)=
=3-4<----正負得負
=-1
10+(-4)=
=10-4<---正負得負
=6
(+4)+(+5)=
=4+5
=9
(-5)+(+3)=
=-5+3
=-2
(-11)+(6)=
=-11+6
=-5
6+(-44)=
=6-44<----正負得負
=-38
-13+(35)+(-3)=
=-13+35-3<---正負得負
=22-3
=19
參考: 正負得負;負負得正;正正得正
2007-09-13 5:21 am
(+2)+(+5)=2+5=7
(+7)+(-4)=7-4=3
3+(-4)=3-4=-1
10+(-4)=10-4=6
(+4)+(+5)=4+5=9
(-5)+(+3)=-5+3=-2
(-11)+(6)=-11+6=-5
6+(-44)=6-44=-38
-13+(35)+(-3)=-13+35-3
-5+(-8)+10=-5-8+10=-3
(+3)-(-2)=3+2=5
(+9)+(-5)=9-5=4
1-(-2)=1+2=3
5-(-4)=5+4=9
(-1)-(+2)=-1-2=-3
(-12)-(-13)=-12+13=1
-7+(-3)=-7-3=-10
(-6)-13=-6-13=-19
(+4)-(+5)+(-2)=4-5-2=-3
(-4)+(-6)-(-5)=-4-6+5=-5
2-(-4)+(-3)=2+4-3=3
(-3)-2-(-4)=-3-2+4=-1
(-3)-(-8)-(+4)=-3+8-4=1
-12+3-(-3)=-12+3+3=-6
I am a Form 3 student
(+7)+(-4)=7-4=3
3+(-4)=3-4=-1
10+(-4)=10-4=6
(+4)+(+5)=4+5=9
(-5)+(+3)=-5+3=-2
(-11)+(6)=-11+6=-5
6+(-44)=6-44=-38
-13+(35)+(-3)=-13+35-3
-5+(-8)+10=-5-8+10=-3
(+3)-(-2)=3+2=5
(+9)+(-5)=9-5=4
1-(-2)=1+2=3
5-(-4)=5+4=9
(-1)-(+2)=-1-2=-3
(-12)-(-13)=-12+13=1
-7+(-3)=-7-3=-10
(-6)-13=-6-13=-19
(+4)-(+5)+(-2)=4-5-2=-3
(-4)+(-6)-(-5)=-4-6+5=-5
2-(-4)+(-3)=2+4-3=3
(-3)-2-(-4)=-3-2+4=-1
(-3)-(-8)-(+4)=-3+8-4=1
-12+3-(-3)=-12+3+3=-6
I am a Form 3 student
2007-09-13 5:20 am
++ =+
- - =+
+ - = -
- + = -
eg: +1-(-1) <===加數
+1+(-1) <===減數
+1-(+1) <===減數
+1+(+1) <===加數
先* / 後 + -
-12+3-(-3)= -12+(-9) ===> + 108
(+4)-(+5)+(-2)= -20+(-2) ====> + 40
- - =+
+ - = -
- + = -
eg: +1-(-1) <===加數
+1+(-1) <===減數
+1-(+1) <===減數
+1+(+1) <===加數
先* / 後 + -
-12+3-(-3)= -12+(-9) ===> + 108
(+4)-(+5)+(-2)= -20+(-2) ====> + 40
參考: 你學校是否填鴨式o.o? 不會動腦嗎
2007-09-13 5:10 am
5+2=7
7-4=3
3-4=-1
10-4 =6
4+5=9
-5+3=-2
-11+6=-5
6-44=-38
-13+(35)+(-3)=19
-5+(-8)+10=-3
(+3)-(-2)=5
(+9)+(-5)=4
1-(-2)=3
5-(-4)=9
(-1)-(+2)=-3
(-12)-(-13)=1
-7+(-3)=-10
(-6)-13=-19
(+4)-(+5)+(-2)=-3
(-4)+(-6)-(-5)=-15
2-(-4)+(-3)=3
(-3)-2-(-4)=-1
(-3)-(-8)-(+4)=1
-12+3-(-3)=-6
記得 正正得正,付付得付 正付得付 就得了
7-4=3
3-4=-1
10-4 =6
4+5=9
-5+3=-2
-11+6=-5
6-44=-38
-13+(35)+(-3)=19
-5+(-8)+10=-3
(+3)-(-2)=5
(+9)+(-5)=4
1-(-2)=3
5-(-4)=9
(-1)-(+2)=-3
(-12)-(-13)=1
-7+(-3)=-10
(-6)-13=-19
(+4)-(+5)+(-2)=-3
(-4)+(-6)-(-5)=-15
2-(-4)+(-3)=3
(-3)-2-(-4)=-1
(-3)-(-8)-(+4)=1
-12+3-(-3)=-6
記得 正正得正,付付得付 正付得付 就得了
參考: me
2007-09-13 5:10 am
你先要知正正得正, 負負得正, 正負得負 , 負正得負...
如第一題
(+2)+(+5)=
即是解作 2 + 5, 所以等如7
而第二題
(+7)+(-4)=
即是解作 7-4, 所以是3, 因為-4 之前一個符號是+, 那麼正負得負, 所以係 -4
明白嗎?
其他要自己做了。
2007-09-12 21:14:17 補充：
我覺得大家唔應該俾晒全部答案佢, 咁佢唔駛自己明白,唔駛做啦, 你地害左佢喇。
如第一題
(+2)+(+5)=
即是解作 2 + 5, 所以等如7
而第二題
(+7)+(-4)=
即是解作 7-4, 所以是3, 因為-4 之前一個符號是+, 那麼正負得負, 所以係 -4
明白嗎?
其他要自己做了。
2007-09-12 21:14:17 補充：
我覺得大家唔應該俾晒全部答案佢, 咁佢唔駛自己明白,唔駛做啦, 你地害左佢喇。
2007-09-13 5:09 am
(+2)+(+5)=+7
(+7)+(-4)=-3
3+(-4)=-1
10+(-4)=-6
(+4)+(+5)=+9
(-5)+(+3)=+2
(-11)+(6)=-5
6+(-44)=-38
-13+(35)+(-3)=19
-5+(-8)+10=-3
(+3)-(-2)=5
(+9)+(-5)=+4
1-(-2)=3
5-(-4)=9
(-1)-(+2)=-3
(-12)-(-13)=1
-7+(-3)=-10
(-6)-13=-19
(+4)-(+5)+(-2)=-3
(-4)+(-6)-(-5)=-5
2-(-4)+(-3)=3
(-3)-2-(-4)=-1
(-3)-(-8)-(+4)=1
-12+3-(-3)=-6
(+7)+(-4)=-3
3+(-4)=-1
10+(-4)=-6
(+4)+(+5)=+9
(-5)+(+3)=+2
(-11)+(6)=-5
6+(-44)=-38
-13+(35)+(-3)=19
-5+(-8)+10=-3
(+3)-(-2)=5
(+9)+(-5)=+4
1-(-2)=3
5-(-4)=9
(-1)-(+2)=-3
(-12)-(-13)=1
-7+(-3)=-10
(-6)-13=-19
(+4)-(+5)+(-2)=-3
(-4)+(-6)-(-5)=-5
2-(-4)+(-3)=3
(-3)-2-(-4)=-1
(-3)-(-8)-(+4)=1
-12+3-(-3)=-6
參考: 負負得正,正正得正,正負得負,負正得正 公式
2007-09-13 5:08 am
(+2)+(+5)=+7
(+7)+(-4)=+3
3+(-4)=-1
10+(-4)=+6
(+4)+(+5)=+9
(-5)+(+3)=-2
(-11)+(6)=-5
6+(-44)=-38
-13+(35)+(-3)=+19
-5+(-8)+10=-3
(+3)-(-2)=+5
(+9)+(-5)=+4
1-(-2)=+3
5-(-4)=+9
(-1)-(+2)=-3
(-12)-(-13)=+1
-7+(-3)=-10
(-6)-13=-19
(+4)-(+5)+(-2)=-3
(-4)+(-6)-(-5)=-5
2-(-4)+(-3)=+3
(-3)-2-(-4)=-1
(-3)-(-8)-(+4)=+1
-12+3-(-3)=-6
2007-09-12 21:11:46 補充：
remember this rule of thumb and u can then calculate very quickly(add)(add) = (add)(add)(minus) = (minus)(add)(minus) = (minus)(minus)(minus) = (add)
2007-09-12 21:13:58 補充：
ie, different signs gives (minus)same signs gives (add)
(+7)+(-4)=+3
3+(-4)=-1
10+(-4)=+6
(+4)+(+5)=+9
(-5)+(+3)=-2
(-11)+(6)=-5
6+(-44)=-38
-13+(35)+(-3)=+19
-5+(-8)+10=-3
(+3)-(-2)=+5
(+9)+(-5)=+4
1-(-2)=+3
5-(-4)=+9
(-1)-(+2)=-3
(-12)-(-13)=+1
-7+(-3)=-10
(-6)-13=-19
(+4)-(+5)+(-2)=-3
(-4)+(-6)-(-5)=-5
2-(-4)+(-3)=+3
(-3)-2-(-4)=-1
(-3)-(-8)-(+4)=+1
-12+3-(-3)=-6
2007-09-12 21:11:46 補充：
remember this rule of thumb and u can then calculate very quickly(add)(add) = (add)(add)(minus) = (minus)(add)(minus) = (minus)(minus)(minus) = (add)
2007-09-12 21:13:58 補充：
ie, different signs gives (minus)same signs gives (add)
收錄日期: 2021-04-13 13:27:34
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070912000051KK03936