The activities in this resource can be used to introduce or practice the Georgia Standards of Excellence:
MGSE1.OA.6 Add and subtract within 20.
a. Use strategies such as counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction; and creating equivalent but easier or known sums.
Subtraction Strategies includes two specific subtraction strategies:
Each strategy provides hands-on activities (e.g., 10 frame mats and spinners). All activities have a corresponding response sheet.
Keywords: Whitney Kicklighter, first grade, 1.OA.6a, subtraction, operations and algebraic thinking, math extensions, related facts, decomposing numbers