Numbers!

123456789101112
Across
  1. 1. Writes in lead
  2. 2. pakcckaB
  3. 5. You write inside this
  4. 10. =
  5. 12. Erases writing
Down
  1. 1. 7+3=10
  2. 3. 7+3
  3. 4. =10
  4. 5. 1, 2, 3, 4, 5...
  5. 6. 1, 3, 5, 7...
  6. 7. 2, 4, 6, 8...
  7. 8. Writes in ink
  8. 9. +
  9. 11. Measures things