Across
- 4. diagram a rectangular model
- 5. the numbers that are multiplied together to get a product
- 6. a mathematical phrase that contains numbers and/or letters and at least one operation
- 8. operation two operations that undo each other
- 9. the result of using smaller numbers to estimate a sum or product
Down
- 1. the answer to a multiplication problem
- 2. to give a close guess
- 3. numbers close in value to the original number but easier to estimate or calculate
- 6. a mathematical sentence that uses a equal sign to show that two operations have the same value
- 7. the result of using bigger numbers to estimate a sum or product