Lesson plan

# 10. Using a number line to solve two-step addition and subtraction problems (A)

teaches Common Core State Standards CCSS.Math.Content.2.OA.A.1 http://corestandards.org/Math/Content/2/OA/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

## You have saved this lesson plan!

Here's where you can access your saved items.

Dismiss

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson plan.

Lesson objective: Solve 2-step story problems that involve addition and/or subtraction using a number line.

This lesson provides an opportunity for students to apply their knowledge and understanding of modeling addition and subtraction problems on a number line diagram to a real-life situation. Students are asked to write equations and draw number line diagrams to solve a problem with a multi-step solution.

Key Concept students will use:

• We can use a number line to solve many types of addition and subtraction problems.

Skills students will use:

• create an addition or subtraction equation with an unknown to represent a problem situation (Grade 1, Unit 18)
• model addition and subtraction using a number line diagram

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they look for number patterns and relationships on the number line to develop computational strategies.

Key vocabulary: