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AverEjercicio 1
A+B+C
2/13 + 6/13 + 5/13= 13/13
A+B-C
2/13+6/13- 5/13= 7/13 - 5/13 = 2/13
Ejercicio 2
A+ B+ C
2/6 + 3/5 + 2/30
Primero sacamos mcm o mcd
6 - 5 - 30 | 6 \. 6x 5 = 30
1 - 5 - 5 | 5 /
1 - 1 - 1
Ahora seguimos
2/6 + 3/5 + 2/30 = 2 + 3 + 2= 7
————. —-
30. 30
A + B - C
2/6 + 3/5 - 2/30 = 2 +3 - 2 = 3
————- ——
30. 30
Ejercicio 3
A+ B + C
2/5 + 4/3 + 1/4
Hacemos lo mismo sacamos mcm o mcd
5 - 3 - 4 | 5 \
1 - 3 - 4. | 3. 5x3x4 = 60
1 - 1 - 4. | 4 /
1 - 1 - 1. |
2/5 + 4/3 + 1/4 = 2 + 4 + 1 = 7
————- ——
60. 60
A+ B - C
2/5 + 4/3 - 1/4 = 2 + 4 - 1 = 5
————- ——
60. 60
Ejercicio 4
A + B + C
1/3 + 4/3 + 2/18
3 - 3 - 18 | 3\
1- 1 - 6 | 6/. 3x6 = 18
1- 1 -1. |
1/3+ 4/3 + 2/18 = 1 + 4 + 2 = 7
—————. —
18. 18
A + B - C
1/3 + 4/3 - 2/18 = 1 + 4 - 2 = 3
————- —
18. 18