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Lesson Plan

5. Write decimal numbers in expanded notation (FP)

teaches Common Core State Standards 6.5C
teaches Common Core State Standards 4.2B
teaches Common Core State Standards 5.2A
teaches Common Core State Standards CCSS.Math.Content.5.NBT.A.3a
teaches Common Core State Standards CCSS.Math.Practice.MP7
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Lesson objective: Write decimal numbers in expanded notation, representing each digit’s value as a product of the digit itself and a decimal fraction.

This lesson helps to build procedural skill with expanded notation of a decimal number using fractions. Place value chart is used here because it visually supports the idea of the values of individual digits within a number. This work develops students' understanding that when the place value extends to thousandths, the structure does not change.

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they evaluate and demonstrate each digit's value through the expanded notation of a number using fractions.

Key vocabulary:

  • decimal

  • digit

  • expanded notation

  • hundredths

  • tenths

  • thousandths

  • value of a digit

Special materials needed:

  • place value chart
Related content

Appears in

Expanding understanding of place value to decimals

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