Math crossword

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Across
  1. 2. time
  2. 4. dots in your math
  3. 5. line endless straight line
  4. 8. song we did
  5. 11. egyptian pyramids
  6. 12. numbers on top of each other
  7. 13. involves everything in here
  8. 15. ice-cream
  9. 16. x
  10. 18. digits
Down
  1. 1. a box
  2. 2. used to calculate faster
  3. 3. ÷
  4. 6. the answer
  5. 7. advanced math
  6. 9. problem problem solving problems
  7. 10. The teacher
  8. 14. +
  9. 15. line has no corners but never stops
  10. 17. digit 10/20/40/34