## 2.OA.A.1

## Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

58 Lesson(s)

#### Students often think that subtraction is simply “take away.” The goal of this lesson is to allow students to see the comparison (difference) between two numbers.

#### The big idea of this lesson is that students can solve for near doubles by thinking of the related doubles fact.

#### As mathematical thinkers we must use the information from a real world problem and determine what is the correct method to solve the problem.

#### The big idea of this lesson is that sometimes it may be necessary to answer one problem to help answer another problem.

Big Idea: