a)8 intregi1/6:2 intregi1/3=8×6+1/6: 3×2+1/3=48+1/6:6+1/3=
=49/6:7/3=49/6 ×3/7=2/2= 1
b)(2,5 +3)²=(25/10+3)²=(25+30/10)²=(55/10)²=55²/10²=3025/100=605/20=121/4
c)3intregi 3/4-1,25=3×4+3/4-125/100=15/4-125/100=25×15-125 totul pe 100=
=375-125/100=250/100=
=25/10=5/2