Optellen en aftrekken van ongelijknamige breuken
1/2 + 1/3 =
- 5/6
- 2/5
- 1/6
- 1/5
1/4 + 2/5 =
- 13/20
- 3/9
- 3/20
- 12/20
2/3 + 1/6 =
- 5/6
- 3/6
- 3/9
- 3/18
3/4 + 1/8 =
- 7/8
- 4/12
- 12/4
- 4/8
1/2 + 1/7 =
- 9/14
- 8/14
- 2/9
- 14/8
2/5 - 1/3 =
- 1/15
- 1/2
- 3/15
- 11/15
7/9 - 1/3 =
- 4/9
- 6/6
- 6/9
- 3/9
8/15 - 2/5 =
- 2/15
- 6/15
- 6/10
- 10/15
7/12 - 1/4 =
- 4/12 = 1/3
- 6/8 = 3/4
- 6/12 = 1/2
- 3/12 = 1/4
9/6 - 2/3 =
- 5/6
- 4/6
- 7/3
- 3/7