Primer Tarea 1ª5 Algebra T. Mat 21/08/2009

1.- R= -10080

2.-R= -1

3.- R=1872

4.-R= 135

5.-R= 0

6.- R= 7608/1485
(12/5)(6/3)= 72/15
(4/9)(8/11)= 32/99
72/15 + 32/99= 7128+480/1485= 7608/1485


7.- R= 32/3
14/3+15/2= 28+46/6= 73/6
73/6 - 6/4 = 292 - 36/24= 256/24= 128/12= 64/6 = 32/3

8.-R= -359/416
(12/5)(15/4)= 128/20
(13/7)(16/9)= 208/63
(128/20)/(208/63)= 11340/4160
(11340/4160)(-5/1)= -56700/4160
-56700/4160 + 1/2= -113400 + 4160/8320= -7180/8320= 3590/4160= -1795/2080= -359/416

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

10.-R= -907/480(9/8)(8/6)=(72/48)/(25/4)=288/1200)(13/45)(45/2)=585/90288/1200 + 585/90 = 25925+702000/108000= 227925/108000227925/108000 - 16/4= 911700-1728000/432000= -816300/432000= -408150/216000=-204075/108000= -68025/36000= -22675/12000= -4535/2400= -907/480

11.- R=845879/12915
(33/17)(45/12)= 1485/204 + 3/5=7425+615/1025= 8040/1025 - 18/7= 56280-18450=
37830/7175 + 16/9= 340470+114800/64575= 455270/64575 - 25/5=
22761350-1614375/322875=21145975/322875=4229395/64575= 845879/12915