South Dakota Standards
SD.3.N. Number Sense: Students will develop and use number sense to investigate the characteristics of numbers in a variety of forms and modes of operation.
3.N.3. Develop conjectures, predictions, or estimations in the process of problem solving and verify or justify the results.
3.N.3.1. Application: Students are able to round two-digit whole numbers to the nearest tens, and three-digit whole numbers to the nearest hundreds.