Across
- 5. Taking one number away from another.
- 7. Calculations that are done in a person's head without the guidance of pencil and paper, calculators or other aids.
- 8. The answer to any subtraction problem.
- 9. Find a solution to an equation.
Down
- 1. Addition property where numbers can be added in any order and the sum remains the same.
- 2. Finding the total, or sum, by combining two or more numbers.
- 3. Addition property where addends can be regrouped and the sum remains the same.
- 4. A symbol or letter that stands for a number.
- 6. The answer to any addition problem.