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Lesson Plan

2. Fluently adding ten to a two-digit number (FP)

teaches Common Core State Standards CCSS.Math.Content.1.NBT.C.5 http://corestandards.org/Math/Content/1/NBT/C/5
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
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Lesson objective: Students will be able to fluently add ten to a 2-digit number.

This lesson helps to build fluency with adding 10. Cubes and hundred charts are used here because students can access a concrete or abstract representation. This work develops students' understanding that 10 can be added to any two-digit number without having to count on.

Students engage in Mathematical Practice 5: Use Appropriate Tools Strategically as they choose their preferred tool (cubes or hundred charts) to practice adding 10 fluently.

Key vocabulary:

  • add
  • more
  • ones' place
  • place value
  • tens' place

Special materials needed:

  • cubes (towers of 10 cubes and loose cubes)
  • hundred charts (1 per pair of students)
  • number cards (1 set per pair of students)
  • recording sheets (1 per student)
Related content

Appears in

Adding multiples of ten

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