MT.CC.6.NS. The Number System
Apply and extend previous understandings of numbers to the system of rational numbers.
6.NS.7. Understand ordering and absolute value of rational numbers.
6.NS.7.b. Write, interpret, and explain statements of order for rational numbers in real-world contexts. For example, write –3 degrees C > –7 degrees C to express the fact that –3 degrees C is warmer than –7 degrees C.