SEGUNDA TAREA 1ª4 T.MAT 28/08/2009

1.- ((6/14)(2/13)/(5/2))+ 2/7 =142/455
12/182= 6/91
(6/91)/(5/2)= 12/455 +2/7 =84+910/3185 = 994/3185 = 142/455


2.- 9/7 + 6/5 -18/12 -1/5 =83/70
45+42/35 = 87/3590-12/60 = 78/60 = 39/30 = 13/10
(87/35)-(13/10) = 870-445/350 = 415/350 = 83/70

3.- 3/9 - 16/4 +25 = 64/3
12-144/36 = -132/36 = -22/6
(-22/6)+(25/1) = -22+150/6 = 128/6 = 64/3

4.- 25 - 16 - 48 - 76 + 65 + 82 - 45 + 12 = -1
9
-39
-115
-5032
-13
-1

5.- (2)(-9)(3)(-8)(7)(-6)(5)(4)(16)(-2) = 11612160
-18
-54
432
3024
-18144
-90720
-362880
-5806080
11612160

6.- 11/3 + 22/8 -3/4 = 68/12
88+66/24 = 154/24 = 77/12
(77/12)+(3/4) = 308-36/48 = 272/48 = 68/12

7.- ((13/6)(33/4)/(19/16)) + 22 -18 = 2916/157
429/24 = 143/8(143/8)/(19/16) = 2288/157
(2288/157)+(22/1) = 2288+3454/157 = 5742/42
(5742/42)-(18/1) = 5742-2826/157 = 2916/157

8.- 17 - 13 +62 -((33/3)(15/3)/3) = -99/27
4
66
(495/9)-(66/1) = 495-594/9 = -99/9
(-99/9)/(3/1) = -99/27

9.- (17)(1/5)(-4)(-6)(-2/7)(1/6)(45/6)(-2)= -408/7
17/5 * -4/1 =-68/5-68/5 * - 6/1 = 408/5 * -2/7 = 816/35
816/35 * 1/6 = 816/210 = 136/35
136/35 * 45/6 = 6120/210 = 1020/35 = 204/7204/7 * -2/1 = -408/7

10.- -15 +15 -48 -65 -36 +52 +89 -79 +62 -69 = -94
0
-48
-113
-149
-97
-8
-87
-25
-94