7/18 - 1/45=...;11/42-5/28=...;13/60-7/40=...;Поможіть будь ласка!

Question

7/18 - 1/45=...;11/42-5/28=...;13/60-7/40=...;Поможіть будь ласка!

Answer 1

7/18 - 1/45 = 35/90 - 2/90 = 33/90 = 11/30

11/42 - 5/28 = 22/84 - 15/84 = 7/84 = 1/12

13/60 - 7/40 = 26/120 - 21/120 = 5/120 = 1/24