Crack The Code: Operations & Algebraic Thinking Vocabulary Part 2

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Across
  1. 2. The answer to an addition problem.
  2. 4. A missing number or value that needs to be found in a math problem.
  3. 5. A plan or method used to solve a math problem.
  4. 6. An unknown number in an addition problem.
Example: 5 + ___ = 9
  5. 8. A math sentence that is not correct.
Example: 5 + 2 = 10
  6. 10. An addition strategy using a doubles fact and adding one more.
Example: 4 + 5 = 4 + 4 + 1
  7. 16. A rule that says changing the order of numbers does not change the answer in addition.
Example: 3 + 5 = 5 + 3
  8. 17. Groups that each have the same number of objects.
  9. 19. Solving math problems in your head without writing them down.
Down
  1. 1. Addition facts that use the same numbers in a different order but have the same sum.
Example: 2 + 6 = 8 and 6 + 2 = 8
  2. 3. A math sentence that is correct.
Example: 4 + 2 = 6
  3. 7. Addition facts where the same number is added twice.
Example: 4 + 4 = 8
  4. 9. Vertical lines of objects in an array.
  5. 11. Counting forward by the same number each time.
Example: 2, 4, 6, 8
  6. 12. A math problem written using words and real-life situations.
  7. 13. The math operation used to find how much is left or the difference.
  8. 14. To take one number away from another number.
  9. 15. Horizontal lines of objects in an array.
  10. 18. To find the answer to a problem.