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simplifico donde se puede
26 (9/8)-4(7/5)
117/2 - 28/5
585 - 56
--------------
10
529/10
ejercicio 2
2(17/15) +3(12/9)
34/15 + 3(4/3)
34/15 + 4
34 + 60
-------------
15
94/15
ejercicio 3
25(19/16) - 2(7/6)
------------------------------
4(12/10)
475/16 - 7/3
-------------------
24/5
1425 - 112
----------------
48
-----------------
24/5
1313/48
-------------
24/5
6565/1152
ejercio 4
16(20/18) - 20(10/8)
--------------------------------
10(6/4)
16(10/9) - 20(10/8)
-------------------------
10(6/4)
160/9 - 25
-----------------
15
160 - 225
------------------
9
-----------------------
15
-95/9
--------
15
-95
------
135
ejercicio 5
igualmente simplificamos donde se pueda simplificar
13(9/2)- 4(7/5)
117/2 - 28/5
585 - 56
--------------
10
529/10
ejercicio 6
simplifico
3(21/4) - (16/7)
-----------------------
4(8/7)
63/4 - 16/7
-----------------
32/7
441 - 64
----------------
28
---------------------
32/7
simplifico extremos con medios y viceversa
378/28
-------------
32/7
378/128
189/64
ejercicio 7
9(21/10) + 2(31/15)
---------------------------------
16(54/53) -3 (9/7)
189/10 + 62/15
--------------------------
864/53 - 27/7
567 + 124
-----------------
30
------------------------
6048 - 1431
-------------------
371
691/30
-------------------
4617/371
256361
------------
13830
ejercicio 8
simplificamos
6(27/13) -3(21/20)
-----------------------------
15(8/6) +2(11/9)
142/13 - 63/20
---------------------
20 + 22/9
2840 - 819
-----------------
260
---------------------
180 + 22
--------------------
9
2021/260
-----------------
202/9
18189
-----------
52520