a) 2:(2/3)^2+11/5:11/10=
= 2×(3/2)^2+11/5 ×10/11=
= 9/2+2=
= (9+4)/2=13/2
b) (3-1/3)^2+(2-1/2)^2-(1 întreg și 1/2)^2=
= (8/3)^2+(3/2)^2-(3/2)^2=
= 64/9
c) [(1/2+2/3+5/6):7/12-2/5×5/6]×1/4:(5×12/25-1intreg și 1/3)=
= [(3+4+5)/6)×12/7-2/6]×1/4:(12/5-4/3)=
= (12/6 ×12/7-1/3)×1/4:(36-20)/15=
= (2 ×12/7-1/3)×1/4×15/16=
= (24/7-1/3)×15/64=
= (72-7)/21×15/64=
=65/7×5/64=
=325/448
d) (1-1/2)×(1-1/3)×(1-1/4)×...×(1-1/50)=
= 1/2×2/3×3/4×...×49/50=
= 1/50
