# 2. Practice solving compare problems (F)

teaches Common Core State Standards CCSS.Math.Content.1.OA.A.1 http://corestandards.org/Math/Content/1/OA/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2

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Lesson objective: Solve compare problems.

This lesson helps to build fluency with solving compare problems (more version). Counters and number lines are used here because they support student understanding of comparing two groups. This work develops students' understanding that objects and drawings can be used to solve situational problems.

Students engage in Mathematical Practice 2 (reason abstractly and quantitatively) as they solve compare problems.

Key vocabulary:

• compare
• number line
• make a ten
• strategy
• tool

Special Materials Needed:

• counters
• cubes
• student number lines (optional)
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