N-Q. Quantities
N-Q.A. Reason quantitatively and use units to solve problems.
N-Q.A.1. Use units as a way to understand problems and to guide the solution of multi-step problems; choose and interpret units consistently in formulas; choose and interpret the scale and the origin in graphs and data displays.
N-Q.A.2. Define appropriate quantities for the purpose of descriptive modeling.
N-Q.A.3. Choose a level of accuracy appropriate to limitations on measurement when reporting quantities.