Across
- 5. the property of addition that states for any number, zero plus that number is the number
- 6. the property of addition which states that the grouping of the addends does not change the sum
- 8. a sentence that contains an equal sign showing that two expressions are equal
Down
- 1. the property of addition which states that the order in which two numbers are added does not change the sum
- 2. a number subtracted from another number
- 3. an amount that has not been identified
- 4. the number from which another number is subtracted
- 7. a letter or symbol used to represent an unknown quantity