Subtraction from 6 (1st grade subtraction )

Mrnussbaum.com HomeFlash, Match and WorkMath LabSpeed MathTackle Math Ball

  

Scroll down to find the right answer to the problem. You have two minutes!

4 - 2
5 - 4
6 - 2
6 - 1
3 - 2
4 - 0
0 - 0
6 - 0
5 - 2
4 - 3
3 - 1
6 - 0
6 - 3
5 - 2
6 - 2