South Dakota Standards
SD.1.A. Algebra: Students will use the language of algebra to explore, describe, represent, and analyze number expressions and relations that represent variable quantities.
1.A.3. Interpret and develop mathematical models.
1.A.3.1. Application: Students are able to write number sentences from problem situations using '+' or '-', and '=' with numbers to ten.
SD.1.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.
1.N.2. Apply number operations with real numbers and other number systems.
1.N.2.1. Application: Students are able to solve addition and subtraction problems with numbers 0 to 20 written in horizontal and vertical formats using a variety of strategies.
1.N.3. Develop conjectures, predictions, or estimations to solve problems and verify or justify the results.
1.N.3.1. Application: Students are able to solve addition and subtraction problems up to 20 in context.
1.N.3.1.a. Represent problem situations and solve using concrete objects, pictures, or numbers.
1.N.3.1.b. Explain how one arrives at solutions to problems.