(1) | (2) | (3) | (4) |
1/18 | 19/12 | 5/8 | 17/6 |
(1) | (2) | (3) | (4) |
17/15 | 7/6 | 11/10 | 8/21 |
(1) |
1/8+1/12
=3/24+2/24
=5/24
|
(2) |
1/8-1/12
=3/24-2/24
=1/24
|