Lesson plan

# 5. Solving word problems using addition and subtraction (FP)

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.Content.1.OA.C.6 http://corestandards.org/Math/Content/1/OA/C/6
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8

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Lesson objective: Solve addition and subtraction word problems using tape diagrams and equations.

This lesson helps to build fluency with solving "Put Together/Take Apart" and  "Add To/ Take From" word problems. Tape diagrams are used here to make a pictorial representation of the word problem  This work develops students ability to understand word problems and create addition and/or subtraction equations to solve many types of word problems.

Students engage in Mathematical Practice 2 (reason abstractly and quantitatively)  as they reason about word problems and create tape diagrams to show addition and subtraction situations. (Students engage in decontextualizing word problems.)

Key vocabulary:

• tape diagram
• unknown