Common Core · Grade 8

8.NS.A.1

Grade 8 — Know that numbers that are not rational are irrational, and convert a decimal expansion that repeats eventually into a rational number.

The skill that covers it

Rational & Irrational NumbersSort the real numbers: every fraction is a decimal that stops or repeats, every other decimal is irrational, and both kinds have a place on the number line.Read the lesson →

What a student should be able to do

Decide whether a number is rational or irrational and explain why.
Convert a fraction to a terminating or repeating decimal, and a repeating decimal back to a fraction.
Approximate an irrational number such as sqrt(10) or pi and place it between two rationals.
Order a mixed set of fractions, decimals, roots and pi from least to greatest.

Every Common Core code covered by Math Vale