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-12-34+64-37= -19
recordemos ley de signos
+.+=+
+ . - = -
- . - = +
- . + = -
Espero te sirva!!!
( - 12) + ( - 34) + ( +64) + ( - 37) =
- 12 - 34 + 64 - 37
-12 - 34 - 37 + 64 =
- 83 + 64 =
-19
Aplicamos ley de signos.
+ por + = +
- por - = +
+ Por - = -
- Por + = -