Pre School Maths 3

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble.Note that you will lose points if you ask for hints or clues!
1 + 0 =
1 + 1 =
0 + 0 =
1 + 2 =
2 + 3 =