1ER TAREA 1ª4 ALGEBRA T.MAT 21/08/09

Resolver los siguientes ejercicios, escribiendo el procedimiento:
1. 3+4+5-6-7-4+7-4+9= 7
resultado.-
3+4=7
7+5=12
12-6=6
6-7=-1
-1-4=-5
-5+7=2
2-4= -2
-2+9=7
2. -6+4-6+2-9-8+2+3+6-8-12-43+67= -130
resultado.-
6+4=10
10-6=4
4+2=6
6-9=-3
-3-8=-11
-11+2=-9
-9+3=-6
-6+6=0
0-8=-8
-8-12=-20
-20-43=-63
-63-67=-130
3 (2)(-12)(3)(3)(-2)(1)(3)= 1296
resultado.-
(2)(-12)=-24
(-24)(3)=-72
(-72)(3)=-216
(-216)(-2)=432
(432)(1)=432
(432)(3)=1296
4. (-2)(3)(1)(-4)(5)(6)(-7)(-8)=-40320
resultado.-
(-2)(3)=-6
(-6)(1)=-6
(-6)(-4)=-24
(-24)(5)=-120
(-120)(6)=-720
(-720)(-7)=5040
(5040)(-8)=-40320
5. -4+5-6+7-8+9-12+24-33(2)(-3)(4)(5)= 2160
resultado.-
-4+5=1
1-6=-5
-5+7=2
2-8=-6
-6+9=3
3-12=-9
-9+24=15
15-33=-18
(-18)(2)=-36
(-36)(-3)=108
(108)(4)=432
(432)(5)=2160
Números Racionales
6. (3/4)+(5/9)=19.6/36
resultado.-
12+7.2/36=19.6/36
7. (6/2)-14/4)=-84/8
= -21/2
8. (3/5)(12/3) - (4/7)(6/11)=804/385
resultado.-
(3/5)(12/3)=36/15
(4/7)(6/11)=24/77
36/15-24/77=804/385
9. (((4/3)(6/2)/(4/4)))+(2/5) + 3/4 - 16/7=401/140
resultado.-
(4/3)(6/2)=24/6
(24/6)/(4/4)=96/24
(96/24)+(2/5)=22/5
22/5+3/4=103/20
103/20-16/7=401/140
10. (18/5)(9/2) + 25/3 - 6/4 - 7/15 =
resultado.-
(18/5)(9/2)=162/10
162/10+25/3=368/15
368/15-6/4=691/30
691/30-7/15=677/30
11. (14/3)/(23/11) + 9/6(5/4)=2267/552
resultado.-
(14/3)/(23/11)=154/69
9/6(5/4)=45/24
154/69+45/24=2267/552
12. (((5/25)(16/2)/(25/7)(13/6))/(12/7) + 3/2 =29/13
(5/25)(16/2)=80/50
(13/6)(28/7)=364/42
(80/50)/(364/42)=3360/18200
(3360/18200)/(12/7)=23520/218400
23520/218400+3/2=290/130