Question

Ofer coroana va rog eu din suflet raspundeti ::** Operatii cu numere rationale :

a) (3-9+11-72)+(-9+3) = ___________

b) (2-53)-(-41+79)= ____________

c) (13-20-10)-(14+7) = __________

Answer 1

⇒A) -67-6=-73
⇒B) -51-38=-89
⇒C) -17-21=-38

Answer 2

$a) (3-9+11-72)+(-9+3) = \\ =(-6+11-72)+(-6)= \\ =(5-72)+(-6)= \\ =-67+(-6)= \\ =-73 \\ b).(2-53)-(-41+79)= \\ =-51-38= \\ =-89 \\ c).(13-20-10)-(14+7) = \\ (-7-10)-21= \\ =-17-21=-38$