OA Standard #1 (1.OA.1)

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.

WEB RESOURCES

Link-Cube Addition by Illustrative Mathematics

20 Tickets by Illustrative Mathematics

Sharing Markers by Illustrative Mathematics

DOCUMENT RESOURCES

MOBILE RESOURCES

IWB RESOURCES