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15 + 1 + 22 =
38
Solución :
38
-----------------------------------
g) ( + 30) + 4 + 9 + (+ 15) =
30 + 4 + 9 + 15 =
58
Solución :
58
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h) (- 28 + (- 2) + (+ 15) + (- 7) =
- 28 - 2 + 15 - 7
15 - 28 - 2 - 7
15 - 37
- 22
Solución :
- 22