Question

5. Efectuati: a) [7. (14 -2.7): 212: b) (102 - 82): 6:2 +12019, c) [17. (25 -8.3). 12021 - 15] . 23 - 22.3; d) [(92-24.5): 1+ 5° : (52)41 - 22, e) {[(169: 13-23): 5+ (7.23 -2.3): 5+ 21:19+5} - 23 - 24.3; f) (332 : 32 + 22. 225 - 2 0199): (2710 + 89 - 324 : 182). .​

Answer 1

Explicație pas cu pas:

a.[7*(14-2*7):2]^2=

(7*0:2)^2=0

b.(10^2-8^2):6:2+1^2019=

(100-64):3+1=36:3+1=12+1=13

c.[17-(25-8*3)*1^2021-15]*2^3-2^2*3=

(17-1*1-15)*8-4*3=

1*8-4*3=8-12= -4

d.[(9^2-2^4*5):1+5^9:(5^2)^4]*2^2=

[(81-80)+5^9:5^8]*4=

(1+5)*4=6*4=24

e.{[(169:13-2^3):5+(7*2^3-2*3):5+2^3]:19+5}*2^3-2^4*3=

{[(13-8):5+(7*8-6):5+8]:19+5}*8-16*3=

[(1+50:5+8):19+5]*8-48=

(19:19+5)*8-48=

6*8-48=48-48=0