primer tarea 1°5 T.MAT. 21/08/09

1.-R=(6)(-5)(-2)(-7)(8)
(6)(10)(3)(-7)(8)
(6)(10)(-21)(8)
(6)(10)(-168)
(60)(-168)=-10080

2.-R=(5)(-5)(3)+2+4-7-12+45-33+75
(-25)(3)+2+4-7-12+45-33+75
-75+2+4-7-12+45-33+75
-127+126= -1

3.-R= -134-12+13+54-65+67(2)(-3)(4)
-134-12+13+54-65+67(-6)(4)
-134-12+13+54-65+67(-24)
-134-12+13+54-65-1608
-1819+67=-1752

4.- R=12-44+36-76+89-55+243-74
380-249= 131

5.- R= 0

6.- R=((12/5)(6/3))+((4/9)(8/11))
72/15+32/99
( 7128+980)/985= 8108/985

7.-R= 14/3+15/2-6/4
(28+45)/6 -6/4
73/6-6/4
(292-36)/24=256/24

8.-R= (((12/5)(15/4)/(13/7)(16/9))(-5))+1/2
(((60/20)/(208/63))(-5))+1/2
((3780/4160)(-5))+1/2
-18900/4160+1/2
(37800-4160)/8320= 33640/8320

9.-R=(13/22)/(43/15)-16/7
195/946-16/7
(1365-15136)/6622= -13771/6622

10.-R=((9/8)(8/9)/(25/4))+((13/45)(45/2))-16/4
((1/1)(25/4))+585/90-16/4
4/25+585/90-16/4
(360+14625)/2250-16/4
14985/2250-16/4
(59940-36000)/9000= 23440/9000

11.-R= (33/17)(45/12)+3/5-18/7+16/9-25/5
1485/204+3/5-18/7+16/9-5
(7425+612)/1020-18/7+16/9-5
8037/1020-18/7+16/9-5
(56259-18260)/7140+16/9-5
37999/7140+168/9-5
(341991+114240)/64260 -5
456231/64260-5
(456231-321300)/ 64260= 134931/64260