Răspuns :
0,5-1/2×(3/4-0,25)=
1/2-1/2×(3/4-25/100)=
1/2-1/2×(3/4-1/4)=
1/2-1/2×2/4=
1/2-1/2×1/2=
1/2(1-1/2)=
1/2×1/2=
1/4=
0,250
1/2-1/2×(3/4-25/100)=
1/2-1/2×(3/4-1/4)=
1/2-1/2×2/4=
1/2-1/2×1/2=
1/2(1-1/2)=
1/2×1/2=
1/4=
0,250