South Dakota Standards
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.1. Analyze the structural characteristics of the real number system and its various subsystems. Analyze the concept of value, magnitude, and relative magnitude of real numbers.
1.N.1.2. Knowledge: Students are able to use unit fraction models to create parts of a whole.
1.N.1.2.a. Determine ways in which shapes can be divided into equal pieces, i.e., fractional portions of fourths, halves, and thirds.
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.