Midcontinent Research for Education and Learning
Home

Browse

Search

Purpose

History

Process

Acknowledgment

Reference
Common Core Mathematics K2
Cluster
Represent and solve problems involving addition and subtraction.
Grade 1
1.OA.1.
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
1.OA.2.
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.