вычислити а)25/28-18/35;б)40/63-35/72;в)22/21-21/22.

Question

вычислити а)25/28-18/35;б)40/63-35/72;в)22/21-21/22.

Answer 1

25/28 - 18/35 =  53/140

40/63 - 35/72 =  25/168

22/21 - 21/22 =  43/462

Answer 2

а) 25/28-18/35=625/700-360/700=265/700=53/140

б) 40/63-35/72= 2880/4536-2205/4536=675/4536=25/168

в)22/21-21/22=484/462-441/462=43/462