Question

resolva: a) {200+2•[100-(15•3+20]}-10
b) 45-{37-4•[30-(8+4)•2]:2}​

Answer 1

hahahaha todo Nicolas Cagezinho, Simbora

a) {200+2•[100-(15•3+20]}-10

R:

{200 + 2 • [100  - ( 65 ) ] } - 10

{200 + 2 • [35]} - 10

{200+ 70} - 10  = 270 - 10  = 260

b) 45 - {37-4 • [30-(8+4)•2]:2}​

R:

45 - {37-4 • [30-(12)•2]:2}​

45 - {37-4 • [30- 24]:2}​

45 - {37-4 • [ 6 ]:2}​

45 - {37- 24 : 2}​

45 - {37- 12} = 45 - 25 = 20​

Valeeuuu, Abraços!    ;)