1. а) 7 2/5 – 2=5 2/5
б) 4 3/7 – 4= 3/7
в) 5 6/11 – 3 =2 6/11
г) 6 7/9 – 2= 4 7/9
2. а) 2 – 1 1/2 = 1/2
б) 4 - 2 3/4 = 1 1/4
в) 5 - 1 3/7 = 3 4/7
г) 6 - 5 2/5= 3/5
4. а) 1 1/4 - 1/2 = 1 1/4 - 2/4=3/4
б) 1 1/3- 1/6= 1 2/6 - 1/6 = 1 1/6
в) 1 1/5 - 2/7 = 1 7/35 - 10/35 = 42/35 - 10/35 = 32/35
г) 1 1/2 - 4/5 = 1 5/10 - 8/10= 15/10 -8/10= 7/10
5. а) 3 1/2 - 2 1/3 = 3 3/6 - 2 2/6 = 1 1/6
б) 5 1/4- 3 2/3 = 5 3/12 - 3 8/12= 4 15/12 - 3 8/12= 1 7/12
В) 2 2/5 - 1 3/7= 2 14/35 - 1 15/35=1 49/35 - 1 15/35 = 34/35
Г) 4 1/6 - 1 2/3 = 4 1/6- 1 4/6= 3 7/6 - 1 4/6 = 2 3/6 = 2 1/2