Across
- 1. an ordered set of numbers or objects
- 4. property that states addends can be added in any order and the sum is the same
Down
- 2. property that states addends can be grouped in any order and the sum is the same
- 3. numbers easy to compute mentally and are close to the real number
- 5. property that states the sum of any number and zero is that number
- 6. a number close to an exact amount