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Lesson Plan

3. Composing a ten with equations (FP)

teaches Common Core State Standards 1.5G
teaches Common Core State Standards 2.4B
teaches Common Core State Standards 1.CA.5
teaches Common Core State Standards CCSS.Math.Content.1.NBT.C.4
teaches Common Core State Standards CCSS.Math.Practice.MP6
teaches Common Core State Standards MAFS.1.NBT.3.4
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Lesson objective: Decompose the single-digit number to make a new group ten when adding. 

This lesson helps to build procedural fluency with using equations to compose a new ten. Ten frames are used here to help with the transition to equations because they highlight how many more ones are needed to make a ten.  Students can use this information to inform the equation they use to show making a new ten.   This work develops students' understanding that when adding two-digit numbers, sometimes it is necessary to compose a new ten.  

Students engage in Mathematical Practice 6 (Attend to precision) as they decompose and compose numbers. Students are precise in using equations to represent their problem solving steps.  

Key vocabulary:

  • decompose
  • equation
  • model
  • ones
  • tens
  • ten frame 

Special materials needed:

  • ten frames
  • base ten blocks or unifix cubes
Related content

Appears in

Using understanding of place value to add and subtract

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