Question

rapid va rog mult
multumesc

Answer 1

2. ^=la puterea
a) 20^2-15x (10^2-9^2)=
=20^2-15x1^2=
=20^2-15=
=400-15=
=385 raspuns corect:i

b) [4x(15-2^2x3)+3^2]^3:(2^2^2+2^2+2^0)=
=[4x (15-4x3)+3^2]^3:(16+4+1)=
=[4x (15-12)+3^2]^3:21=
=(4x3+3^2)^3:21=
=(12+3^2)^3:21=
=(12+9)^3:21=
=21^3:21=
=9261:21=
=441 raspuns corect : I

c) 1011 (2) = 1x2^3+0x2^2+1x2^1+1x2^0=
8+0+2+1=
11 (10) raspuns corect : I

d) 51:2=25 (rest 1) :2=12(rest 1) :2= 6 (rest 0) :2=3 (rest 0):2=(1) (rest 1)
= 110011(2) raspuns corect: i

sper ca te-am ajutat!