a 2/3-1/2 kreska ulamkowa 3/4-2/3 b 6/5-2/7 kreska ulamkowa 2/5+5/3 c 1 1/2-2,75 kreska ulamkowa 1 5/6- 2 1/12 d 1,25+27/8kreska ulamkowa 1 5/16+3/8 e 1 5/6-0,625 kreska ulamkowa 4/13-25/39

a) (2/3-1/2) / (3/4-2/3)=(4/6-3/6) / (9/12-8/12)=1/6:1/12=1/6*12/1=12/6=2 b) (6/5-2/7) / (2/5+5/3)=(42/35-10/35) / (6/15+25/15)=32/35:31/15= 32/35*15/31=32/217 c) (1 1/2-2,75) / (1 5/6-2 1/12)=(1,5-2,75) / (1 10/12-2 1/12)= (-1 1/4):(-1/4)=(-5/4)*(-4/1)=5 d) (1,25+2 7/8) / (1 5/16+3/8)=(1 2/8+2 7/8) / (1 5/16+6/16)= 4 1/8:7 11/16=33/8:123/16=33/8*16/123=66/123 e) (1 5/6-0,625) / (4/13-25/39)=(1 5/6-5/8) /(12/39-25/39)= (1 20/24-15/24) / (-13/39)=1 5/24:(-1/3)=29/24*(-3/1)=-29/8=-3 5/8