Răspuns:
a) -10+200=190
b) -600-75=-675
c) -715-(+321)= -715-321= -1036
d) -12-(-78)= -12+78=66
e) |-3+2+9|+|-7|+(-20)= |-1+9|+7+(-20)= 8+7-20= 15-20= -5
f) (-48)+(-25)+48= -25
