Infinite Decimals

Can you support the argument that the decimal 0.99999 ... is equivalent to the number one? The seventh installment in this 25-part module gives convincing support for this conclusion. Pupils write infinite decimals using powers of 10. They then graph these decimals on expanded number lines.

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CCSS: Designed
Instructional Ideas

  • Ask your classes to share and explain their answers to help them practice the new vocabulary
  • Form human number lines to practice placement of infinite decimals
Classroom Considerations

  • Individuals must be familiar with powers of 10 and expanded number lines
Pros

  • Includes a set of problems for independent practice
  • The teacher guide provides questioning suggestions and helpful explanations
Cons

  • None
Common Core