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50/15 + 12/15=62/15=4 i 2/15
5 7/8 + 2/5= 47/8 + 2/5 wspólny mianownik to 40
235/40+16/40= 251/40=6 i 11/40
9/14 + 7 5/6= 9/14 + 47/6 wspólny mianownik tutaj to 42
27/42 + 329/42= 356/42= 8 i 20/42=8 i 10/21
19/22 + 6 5/11= 19/22 + 71/11 wspólny mianownik 22
19/22+ 142/22 = 161/22 = 7 i 7/22
d) 4 1/4 + 5 2/3 = 4+5 + 3/12 + 8/12 = 9 i 11/12
6 9/10 + 3 7/15 = 9 + 27/30 + 14/30= 9 + 41/30= 10 i 11/30
10 31/36 + 2 9/24 = 19 + 62/72 + 27/72 = 19 + 89/72= 20 i 17/72
11 13/18 + 1 22/27 = 12 + 39/54 + 44/54 = 12 + 83/54 = 13 i 29/54