Odpowiedź:
[tex]14\frac{2}{3}+17\frac{5}{7}=14\frac{14}{21}+17\frac{15}{21}=31\frac{29}{21}=32\frac{8}{21}\\\\\\91\frac{3}{4}-72\frac{2}{9}=91\frac{27}{36}-72\frac{8}{36}=19\frac{19}{36}[/tex]
Odpowiedź:
14 i 2/3 + 17 i 5/7 = 14 i 14/21 + 17 i 15/21 = 31 i 29/21 = 32 i 8/21
91 i 3/4 - 72 i 2/9 = 91 i 27/36 - 72 i 8/36 = 19 i 19/36
