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!

1. Finish the table:

+	15	27	39
28
19
36
48

2. Finish the table:

+	11	23	45
33
27
17
46

3. Finish the table:

-	29	56	48
92
81
62
75

4. Finish the table:

-	24	37	53
96
79
61
68