Question

Calculeaza:
7*2-5=
2*6-6=
(25-20)*2=
(40-30)*2=
(5+3)*2=
(6+3)*2=

Answer 1

14-5=9
12-6=6
5x2=10
10x2=20
8x2=16
9x2=18

Answer 2

Prima oara se efectueaza operatiile de gradul I(inmultirea si impartirea), spoi cele de gradul II(adunarea si scaderea). Daca sunt paranteze, se efectueaza tot ce se poate in ele, apoi operatiile de gradul I si II.
7*2-5= 14 - 5 = 9
2*6-6= 12 - 6 = 6
(25-20)*2= 5 * 2 = 10
(40-30)*2= 10 * 2 = 20
(5+3)*2= 8 * 2 = 16
(6+3)*2= 9 * 2 = 18