Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

10. Mystery Number: Using understanding of place value to round decimals in word problems (A)

teaches Common Core State Standards CCSS.Math.Content.5.NBT.A.4 http://corestandards.org/Math/Content/5/NBT/A/4
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
Quick Assign

You have saved this lesson!

Here's where you can access your saved items.

Dismiss

Card of

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Lesson objective: Apply understanding of rounding decimals to any place value.

This lesson provides an opportunity for students to apply their knowledge and understanding of rounding decimals to a mathematical situation. Students are asked to determine a mystery number by applying the given parameters to their understanding of place value and the rounding of decimals.

Key Concept students will use: 

  • Decimals can be rounded just as whole numbers can.

Skills students will use:

  • Understanding of place value
  • Rounding whole numbers to the nearest 10 or 100 (Grade 3, Unit 3)

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they round decimals to any place using number lines, place value charts, and their understanding of place value.  

Key vocabulary: 

  • decimal
  • hundredths
  • number line
  • place value
  • rounding
  • tenths
  • thousandths

Special materials needed:

  • scratch paper, as needed
Related content

Appears in

Comparing and rounding decimals

Provide feedback