Lesson Plan

10. Compare decimals to solve word problems (A)

teaches Common Core State Standards CCSS.Math.Content.4.NF.C.5 http://corestandards.org/Math/Content/4/NF/C/5
teaches Common Core State Standards CCSS.Math.Content.4.NF.C.6 http://corestandards.org/Math/Content/4/NF/C/6
teaches Common Core State Standards CCSS.Math.Content.4.NF.C.7 http://corestandards.org/Math/Content/4/NF/C/7
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Lesson objective: Solve more complex word problems that compare decimals and fractions.

This lesson provides an opportunity for students to apply their knowledge and understanding of comparing decimals and fractions to a real situation. Students are asked to compare routes from a starting point in town and students have to choose the route that is the shortest.

Key Concept students will use: 

  • We can use place value understanding to compare decimals that refer to the same whole.

Skills students will use:

  • Understanding equivalent fractions (Grade 3, Unit 10)
  • Comparing Fractions (Grade 3, Unit 11)
  • Understanding fraction equivalence and comparison (Grade 4, Unit 5)

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they use organizers to work through a task.  They then use that organization to answer questions as they look to find patterns and repeated reasoning that can help them solve more complex problems . 

Key vocabulary: 

  • decimal
  • denominator
  • equivalent
  • flat
  • greater than
  • less than
  • model
  • number line
  • numerator
  • representation
  • rod
  • unit
  • tenths
  • hundredths

Special materials needed:

  • base 10 manipulative
  • paper copies of flats
  • paper copies of rods
  • tiles
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