Subtracting 1 Set 3

Gap-fill exercise

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. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
2 - 1 =
3 - 1 =
6 - 1 =
10 - 1 =
1 - 1 =
4 - 1 =
7 - 1 =
8 - 1 =
9 - 1 =
5 - 1 =