Răspuns:
2×4+1/4-(1/3+1/2+1/4):(8+5/12)
0,5=5/10=1/2
0,25=25/100=5/20=1/4
9/4-(4+6+3/12):13/12
9/4-13/12:13/12
se schimba semnul in ×
9/4-13/12×12/13
9/4-1= 9-4/4=5/4