Ajutati-ma va rog urgent, am mare nevoie! Ex. 15.

Răspuns:
15.
a)27+5•(6-150)-100=
27+5•(-144)-100=
27-720-100=
27-820=
(-793)
b)(32-48)•5/12•(12-2)+49=
(-16) • 5/12 • 10 + 49 =
(-800)/12 + 49 =
(-200)/3 + 49 =
(-200+147)/3 =
(-53)/3