October 2018 2 25 Report
Calcula las siguientes sumas, agrupando previamente los términos del mismo signo:
a) -3 + (-2) + 5 + (-10) +3 +8
b) -5 + (-1) + 4 + (-12) + 3 + (-7)
c) 9 + (-11) + (-4) + 6 + (-3)
d) -6 +4 + (-3) + (-11) + 9 +8

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