Math crossword

12345678910111213141516171819
Across
  1. 3. a round shape
  2. 4. circle, square, triangle
  3. 6. smaller number
  4. 8. the full amount
  5. 10. show the same
  6. 12. after nine
  7. 13. the sign to subtract
  8. 15. we use these to count
  9. 16. first number
  10. 18. to put numbers together
  11. 19. a shape with 3 sides
Down
  1. 1. nothing
  2. 2. To sign for add
  3. 5. split in two equal parts
  4. 7. a shape with 4 equal sides
  5. 9. to find how long or tall
  6. 11. a straight mark
  7. 13. bigger number
  8. 14. to take away
  9. 17. say numbers in order