dsu coroana va rog am nevoie urgent

Răspuns:
a) DA
1/2+2×1/4=1
1/2+1/2=1 adevarat
2×1/2+8×1/4=3
1+2=3 adevarat
b) DA
3×1/2-2×1/4
3/2-1/2=1
2/2=1
1/2+4×1/4=
1/2+1=
1/2+2/2=3/2
c) NU
4×1/2+1/4=2/1+1/4=8/4+1/4=9/4
6×1/2-4×1/4=6/2-4/4=3-1=2 fals