I can compare and order real numbers using a number line.
CCSS:
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.
https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-negative-number-topic/cc-6th-comparing-negative-numbers/e/ordering-rational-numbers (this one you may need to copy and paste into your browser if the link doesn't work)