oblicz: 3/4+1/3= 2/3-1/5= 3/8+1/2= 7/9-2/3= 1i1/6+2i4/9= 3i1/4-1i5/6=

3/4+1/3=9/12+4/12 = 13/12 2/3-1/5=10/15-3/15 = 7/15 3/8+1/2= 3/8+4/8 = 7/8 7/9-2/3=7/9-6/9 = 1/9 1i1/6+2i4/9=7/6+22/9=21/18+44/18=65/18=3i11/18 3i1/4-1i5/6=13/4-11/6=39/12-22/12=27/12

3\over4+1\over3=9\over12+4\over12=13\over12=11\over12 2\over3-1\over5=10\over15-3\over15=7\over15 3\over8+1\over2=3\over8+4\over8=7\over8 7\over9-2\over3=7\over9-6\over9=1\over9 11\over6+24\over9=7\over6+22\over9=21\over18+44\over18=65\over18=311\over18 31\over4-15\over6=13\over4-11\over6=39\over12-22\over12=17\over12=15\over12 @UP ostatni przykład źle zrobiony ;P bo przecież 39-22=17 ;D