1.When b=(-3)and c=(+2) ,Find:
(a)b∕3c
(b)c-b
(c)2b+c
(d)4bc
2.When e=(-2),f=(+3),g=(-1),Find:
(a)efg
(b)-e-(-f)+c
(c)2e-f-g
(d)e+f∕g
3. (3y+6)∕6 - 3 = 5
y = ?
唔識計F4數-3-我F1炸-3-
2007-12-08 4:45 am
回答 (3)
2007-12-08 4:57 am
✔ 最佳答案
1a. b/3c=(-3)/3(2)= -3/6= -1/2b.c-b=+2+(-3)=+2-3= -1
c.2b+c=2(-3)+2= -6+2=-4
d.4bc=4(-3)(2)=-24
2a. efg=(-2)(+3)(-1)=6
b.-e-(-f)+c= -e+f+c=-(-2)+3-1=4
c.2e-f-g=2(-2)-(+3)-(-1)= -4-3+1= -6
d.e+f∕g=(-2)+(+3)/(-1)=1/-1= -1
3. (3y+6)∕6 - 3 = 5
3y+6/3=5
3y+6=15
3y=9
y=3
參考: 自己
2007-12-09 7:54 pm
1a)(-3)/3(2)
=-3/6
=-1/2
1b)(2)-(-3)
=5
1c)2(-3)+(2)
=-6+2
=-4
1d)4(-3)(2)
=-24
2a)(-2)(3)(-1)
=6
2b)-(-2)-(-3)+(-1)
=2+3-1
=4
2c)2(-2)-(3)-(-1)
=-4-3+1
=-6
2d)(-2)+(3)/(-1)
=-2-3
=-5
3(3y+6)/6-3=5
y/2+1-3=5
y/2=7
y=14
=-3/6
=-1/2
1b)(2)-(-3)
=5
1c)2(-3)+(2)
=-6+2
=-4
1d)4(-3)(2)
=-24
2a)(-2)(3)(-1)
=6
2b)-(-2)-(-3)+(-1)
=2+3-1
=4
2c)2(-2)-(3)-(-1)
=-4-3+1
=-6
2d)(-2)+(3)/(-1)
=-2-3
=-5
3(3y+6)/6-3=5
y/2+1-3=5
y/2=7
y=14
參考: me
2007-12-08 5:01 am
1a.(-3)/3(2)
=(-3)/6
= -1/2
1b.-(-3)
=2+3
=5
1c.
2(-3)+2
=(-6)+2
= -4
1d.
4(-3)(2)
=-24
2a.
(-2)(3)(-1)
=6
2b.
-(-2)-(-3)+2
=7
2c.
2(-2)-(3)-(-1)
=-6
2d
(-2)+3/(-1)
=1
3.
(3y+6)∕6 - 3 = 5
3(y+2)/6-3=5
(y+2/2)-3=5
(y+2/2)=8
y+2=16
y=14
=(-3)/6
= -1/2
1b.-(-3)
=2+3
=5
1c.
2(-3)+2
=(-6)+2
= -4
1d.
4(-3)(2)
=-24
2a.
(-2)(3)(-1)
=6
2b.
-(-2)-(-3)+2
=7
2c.
2(-2)-(3)-(-1)
=-6
2d
(-2)+3/(-1)
=1
3.
(3y+6)∕6 - 3 = 5
3(y+2)/6-3=5
(y+2/2)-3=5
(y+2/2)=8
y+2=16
y=14
收錄日期: 2021-04-29 20:15:32
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https://hk.answers.yahoo.com/question/index?qid=20071207000051KK03262