如題，我在數學上不是太好，所以希望有心人能解答。
1.(+4)-(-4)-(=4)
=4______4______4
=______________
=________
2.-7-3+6
=______+6
=______
3.-4+8-2
=____________
=________
4.1-2+3-4
=____________
=____________
=________
5.-5+5-3-3
=___________
=___________
=_______
6.(+10)+(-5)-(-10)
=___________
=___________
=_______
7. (-2)-(+7)+(+4)
=__________
=__________
=______
8.(+8)-(7)+(-9)
=_________
=_________
=______
9.(-4)+(-3)-(-9)
=_________
=_________
=_____
求解數學問題--有向數(20點!!)
2008-09-14 6:39 am
回答 (4)
2008-09-14 8:02 am
✔ 最佳答案
1.(+4)-(-4)-(-4)=4+4+4
=8+4
=12
2.-7-3+6
=-10+6
=-4
3.-4+8-2
=4-2
=2
4.1-2+3-4
=-1+3-4
=2-4
=-2
5.-5+5-3-3
=0-3-3
=-3-3
=-6
6.(+10)+(-5)-(-10)
=10-5+10
=5+10
=15
7. (-2)-(+7)+(+4)
=-2-7+4
=-9+4
=-5
8.(+8)-(7)+(-9)
=8-7-9
=1-9
=-8
9.(-4)+(-3)-(-9)
=-4-3+9
=-7+9
=2
提示:
正=(+)負=(-)
正正得正
正負得負
負負得正
正負得負
2008-09-14 00:55:59 補充：
提示:
正=(+)負=(-)
正正得正
正負得負
負負得正
(負正得負)
參考: 自己
2008-09-15 10:47 am
1.(+4)-(-4)-(-4)
=12
2.-7-3+6
=-4
3.-4+8-2
=2
4.1-2+3-4
=2-4
=-2
5.-5+5-3-3
=-3-3
=-6
6.(+10)+(-5)-(-10)
=5+10
=15
7. (-2)-(+7)+(+4)
=-9+4
=-5
8.(+8)-(7)+(-9)
=1-9
=-8
9.(-4)+(-3)-(-9)
=-7+9
=2
=12
2.-7-3+6
=-4
3.-4+8-2
=2
4.1-2+3-4
=2-4
=-2
5.-5+5-3-3
=-3-3
=-6
6.(+10)+(-5)-(-10)
=5+10
=15
7. (-2)-(+7)+(+4)
=-9+4
=-5
8.(+8)-(7)+(-9)
=1-9
=-8
9.(-4)+(-3)-(-9)
=-7+9
=2
2008-09-14 7:49 pm
1.(+4)-(-4)-(=4)
=4+4-4
=8-4
=4
2.-7-3+6
=-10+6
=-4
3.-4+8-2
=4-2
=2
4.1-2+3-4
=-1+3-4
=2-4
=-2
5.-5+5-3-3
=0-3-3
=-3-3
=-6
6.(+10)+(-5)-(-10)
=10-5+10
=5+10
=15
7. (-2)-(+7)+(+4)
=-2-7+4
=-9+4
=-5
8.(+8)-(7)+(-9)
=8-7-9
=1-9
=-8
9.(-4)+(-3)-(-9)
=-4-3+9
=-7+9
=2
=4+4-4
=8-4
=4
2.-7-3+6
=-10+6
=-4
3.-4+8-2
=4-2
=2
4.1-2+3-4
=-1+3-4
=2-4
=-2
5.-5+5-3-3
=0-3-3
=-3-3
=-6
6.(+10)+(-5)-(-10)
=10-5+10
=5+10
=15
7. (-2)-(+7)+(+4)
=-2-7+4
=-9+4
=-5
8.(+8)-(7)+(-9)
=8-7-9
=1-9
=-8
9.(-4)+(-3)-(-9)
=-4-3+9
=-7+9
=2
2008-09-14 6:47 am
1.(+4)-(-4)-(=4) I guess the question is +4 - (-4) -(+4)
= 4+4-4
= 4
2.-7-3+6
=-10+6
= -4
3.-4+8-2
=+4-2
=2
4.1-2+3-4
=-1+3-4
=2-4
= -2
5.-5+5-3-3
=0-3-3
=-3-3
= -6
6.(+10)+(-5)-(-10)
= 10-5+10
= 5+10
= 15
7. (-2)-(+7)+(+4)
= -2-7+4
= -9+4
= -5
8.(+8)-(7)+(-9)
= 8-7-9
= 1-9
= -8
9.(-4)+(-3)-(-9)
= -4-3+9
= -7+9
= 2
= 4+4-4
= 4
2.-7-3+6
=-10+6
= -4
3.-4+8-2
=+4-2
=2
4.1-2+3-4
=-1+3-4
=2-4
= -2
5.-5+5-3-3
=0-3-3
=-3-3
= -6
6.(+10)+(-5)-(-10)
= 10-5+10
= 5+10
= 15
7. (-2)-(+7)+(+4)
= -2-7+4
= -9+4
= -5
8.(+8)-(7)+(-9)
= 8-7-9
= 1-9
= -8
9.(-4)+(-3)-(-9)
= -4-3+9
= -7+9
= 2
參考: CLOUDWAH
收錄日期: 2021-04-15 18:31:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080913000051KK02552