Math Crossword

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Across
  1. 2. The identity element for multiplication
  2. 4. What 1, 2, 3, 4, 6, and 12 are, relative to the number 12.
  3. 8. The model algorithm that uses base-10 blocks.
  4. 11. What 10, 15, 20, and 25 are, relative to the number 5.
  5. 12. 5 times 0.
  6. 14. The property that proves that A+(B+C) = (A+B)+C.
  7. 15. The most commonly used algorithm that children are usually taught first.
  8. 17. The property that proves that A+B = B+A.
  9. 18. In the equation "A minus B equals C", the name of A.
Down
  1. 1. The direction that Mr. Turtle always faces in the beginning, regardless of the equation.
  2. 3. In the equation "A divided B equals C", the name of C.
  3. 5. The number that comes after 13 in base-4.
  4. 6. In the equation "A times B equals C", the name of C.
  5. 7. The algorithm used in addition and multiplication that involves adding or multiplying diagonally.
  6. 9. The identity element for addition
  7. 10. In the equation "A minus B equals C", the name of B.
  8. 13. The number smaller than a whole number that can also be written as a division problem.
  9. 16. The number smaller than a whole number that uses a dot to signify place value.