Tolong dikerjakan yang nomornya dilingkari saja.

* 3 6/15 - 9/20
=3 24/60 - 27/60
=2 84/60 - 27/60
= 2 57/60
* 2,7 - 4/5
=2 7/10 - 4/5
= 2 7/10 - 8/10
=1 17/10- 8/10
=1 9/10 (1,9)
* 8 7/20 - 6,5
8 7/20 - 6 5/10
8 7/20 - 6 10/20
7 27/20 - 6 10/20
1 17/20 (1,85)

ada yang ditanyakan, komentar....

2. 3 6/15 - 9/20 = 51/15 - 9/20
= 204/60 - 27/60
= 180/60 = 3

3. 2,7 - 4/5 = 27/10 - 4/5
= 27/10 - 8/10
= 19/10 = 1,9

12. 8 7/20 - 6/5 = 167/20 - 24/20
= 143/20
= 7 3/20