3/8 + 4/8
What is 5/8?
-0.25 + (-3/5)
What is -0.85 or -17/20?
5/21 + 8/21
What is 13/21?
-5/12 + (-5/12)
What is -10/12?
1 7/8 + 2 1/8
What is 4?
1 6/10 + 4 7/10 + 7/10
What is 7?