1. Which fact is related to 4 + 3 = 7 ?
    1.   5 + 2 = 7
    2.   1 + 4 = 5
    3.   3 + 4 = 7
    4.   2 + 6 = 8
  2. Which fact is related to 6 + 2 = 8 ?
    1.   2 + 6 = 8
    2.   4 + 3 = 7
    3.   5 + 0 = 5
    4.   7 + 1 = 8
  3. Which fact is related to 1 + 4 = 5 ?
    1.   2 + 4 = 6
    2.   3 + 3 = 6
    3.   4 + 1 = 5
    4.   3 + 4 = 7
  4. Which fact is related to 4 + 5 = 9 ?
    1.   7 + 3 = 10
    2.   3 + 6 = 9
    3.   5 + 4 = 9
    4.   3 + 3 = 6
  5. Which fact is related to 7 + 2 = 9 ?
    1.   2 + 7 = 9
    2.   4 + 3 = 7
    3.   4 + 5 = 9
    4.   6 + 2 = 8
  6. Which fact is related to 4 + 6 = 10?
    1.   5 + 4 = 9
    2.   6 + 4 = 10
    3.   3 + 4 = 7
    4.   5 + 5 = 10
  7. Which fact is related to 2 + 1 = 3 ?
    1.   3 + 1 = 4
    2.   1 + 2 = 3
    3.   1 + 0 = 1
    4.   2 + 2 = 4
  8. Which fact is related to 8 + 1 = 9 ?
    1.   3 + 5 = 8
    2.   9 + 1 = 10
    3.   1 + 8 = 9
    4.   4 + 4 = 8
  9. Which fact is related to 7 + 3 = 10?
    1.   4 + 6 = 10
    2.   3 + 3 = 6
    3.   2 + 7 = 9
    4.   3 + 7 = 10
  10. Which fact is related to 3 + 6 = 9 ?
    1.   6 + 3 = 9
    2.   4 + 4 = 8
    3.   3 + 3 = 6
    4.   5 + 4 = 9
  11. Which fact is related to 1 + 6 = 7 ?
    1.   6 + 1 = 7
    2.   4 + 5 = 9
    3.   6 + 3 = 9
    4.   7 + 1 = 8
  12. Which fact is related to 2 + 8 = 10 ?
    1.   8 + 1 = 9
    2.   2 + 5 = 7
    3.   1 + 8 = 9
    4.   8 + 2 = 10