Practice identifying rational and irrational numbers with this hidden message puzzle. It works great for Pi Day fun too!
The puzzle asks students to shade the irrational numbers. The problems are simple to complex. Students will need to simplify many of the expressions before knowing if they are rational or irrational. Once the puzzle is shaded correctly, it says, "3.14 is pi day."
A great formative assessment and self-assessment for students.
You will receive a PDF of the one-page activity puzzle and the answer key.
Common Core Standards:
Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually, and convert a decimal expansion which repeats eventually into a rational number.
Explain why the sum or product of two rational numbers is rational; that the sum of a rational number and an irrational number is irrational; and that the product of a nonzero rational number and an irrational number is irrational.
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