Calcular:
a) ( 20 )+(-18)-( 3 )+ (2)
b) (-15)+(22)+(-6)
c)(-73)+(-22)+(-45)+(-92)+(-250)
d)(99)+(-100)+ (-100)+(98)+(-10)
e)(12-5)+3
f)12-(5-3)
gentee e pra amanhã.... PR fvr me ajudemmm
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