1 TAREA DEL GRUPO 1-4

1. 3+4+5-6-7-4+9= 4

3+4+5+9= 21
-6-7-4= -17
21-17= 4

2. -6+4-6+2-9-8+2+3+6-8-12-43-67= -75

4+2+2+3+6= 17
-6-6-9-8-8-12-43= -92
17-92= -75

3. (2)(-12)(3)(3)(-2)(1)(3)= 1296

(-24)(3)
(-72)(3)
(216)(-2)
(432)(3)
= 1296

4. (-2)(3)(1)(-4)(5)(6)(-7)(-8)= 40320

(-6)(1)
(-6)(-4)
(24)(5)
(120)(6)
(720)(-7)
(-5040)(-8)
(40320)

5. -4+5-6+7-8+9-12+24-33(2)(-3)(4)(5)= -6120

1+1+1-12-33
15-33
(-18)+(33)
(-51)(2)
(102)(-3)
(-306)(4)
(-1224)(5)
(-6120)

6. (3/4)+(5/9)= 1 11/36

3/4+5/9=27+20/36 47/36= 1 11/36

7. (6/2)-14/4= -4/8

6/2 -14/4=24-28/8= -4/8

8. (3/5)(12/3)-(4/7)(6/11)= 2262/2520

3/5x12/3= 9/60
4/7x6/11= 44/42
9/60-44/42= 378-2640/2520=2260/2520

9. (((4/5)(6/2)/(4/4)))+(2/5)+3/4-16/7= 65/105

4/3x6/2= 8/24
8/24x4/4= 32/96
2/5+3/4=8+15/20= 23/20
32/96+23/20= 640+2208/1920= 2848/1920
2848/1920-16/7= 19936-11520/13440= 8416/13440= 4208/6720= 2104/3360= 1052/1680
=526/840= 260/420= 130/210= 65/105

10. (18/5)(9/2)+25/3-6/4-7/15= 58500/8100

18/5x9/2= 1/45
16/45+25/3= 48+1125/135= 1173/135
1173/135-6/4= 4692-810/540= 4152/540
4152/540-7/15= 62280-3780/8100= 58500/8100

11. (14/3)/(23/11)+9/6(5/4)= 6501/1656= 3 1533/1656
14/3+23/11= 154/69
9/6x5/4= 45/24
154/69+45/24= 3396+3105/1656= 6501/1656

12. (((5/25)(16/2)/(25/7)(13/6)/(12/7)+3/2= 710440/390000

(5/25x16/12)= 80/50
(25/7x13/16)= 325/112
80/50 / 325/112= 8960/16250
8960/16250 / 12/7= 62720/195000
62720/195000+3/2= 125440+585000/390000= 710440/390000