Lesson plan

7. Rounding to multiple places (FP)

  • From K-5 Math Companion Curriculum
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teaches Common Core State Standards 4.NBT.A.3 http://corestandards.org/Math/Content/4/NBT/A/3
teaches Common Core State Standards MP8 http://corestandards.org/Math/Practice/MP8
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Lesson objective: Round whole numbers to multiple places.

This lesson helps to build fluency with rounding. A number line is used because it offers a visual and establishes benchmark numbers and midpoint within a range of numbers based on place value.  This work develops students' understanding that the same number can be round to multiple places.

Students engage in Mathematical Practice 8 (look for and express regularity in repeated reasoning) as they use the structure of the base 10 system to generalize their strategies to round a six digit number to different place values.  

Key vocabulary:

  • place
  • place value
  • round
  • tie

Special materials needed:

  • paper
  • pencil