Сдроби 1/4 + 3/5
2/3+1/2
1/16+1/4
2) 7/8-1/2
11/14-3/7
8/9-1/3
3) 11/18-2/9
9/16-1/4
3/4-1/2

1)

1/4 + 3/5 = 5/20 + 12/20 = 17/20 = 0,85

2/3 + 1/2 = 4/6 + 3/6 = 7/6 = 1 1/6

1/16 + 1/4 = 1/16 + 4/16 = 5/16 = 0,3125

2)

7/8 - 1/2 = 7/8 - 4/8 = 3/8 = 0,375

11/14 - 3/7 = 11/14 - 6/14 = 5/14

8/9 - 1/3 = 8/9 - 3/9 = 5/9

3)

11/18 - 2/9 = 11/18 - 4/18 = 7/18

9/16 - 1/4 = 9/16 - 4/16 = 5/16 = 0,3125

3/4 - 1/2 = 3/4 - 2/4 = 1/4 = 0,25