Oblicz 17 5/13+2 1/2 6 3/10-2 3/5 8-5 6/13 4,4+1/5 7 3/4-2,5 4 4/9-2,125 4 2/5*5/11 4 2/3:1 3/4 3/8*20*5 1/3

17 i 5/13+2 i 1/2=17i 10/26+2 i 13/26=19 i 23/26 6 i 3/10-2 i 3/5=6 i 3/10-2 i 6/10=5 i 10/10+3/10-2 i 6/10=3 i 7/10 8-5 i 6/13=7 i 13/13-5 i 6/13=2 i 7/13 4,4+1/5=4 i 4/10+1/5=4 i 2/5+1/5=4 i 3/5 7 i 3/4-2,5=7 i 3/4-2 i 5/10=7 i 3/4-2 i 1/2=7 i 3/4-2 i 2/4=5 i 1/4 4 i 4/9-2,125=4 i 4/9-2 i 1/8=4 i 32/72-2 i 9/72=2 i 23/72 4 i 2/5*5/11=22/5*5/11=1 4 i 2/3:1 i 3/4=14/3:7/4=14/3*4/7=8/3=2 i 2/3 3/8*20*5 i 1/3=30/4*16/3=40