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8.NS - Number Systems

Number Systems Domain

Know that there are numbers that are not rational, and approximate them by rational numbers.

  • 8.NS.1 -  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.
  • 8.NS.2 -  Use rational approximations of irrational numbers to compare the size of irrational numbers, locate them approximately on a number line diagram, and estimate the value of expressions


Calculating the cube root using mental math - Great Trick!

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