Estimate and compute unit cost of consumables (to include unit conversions if necessary) sold in quantity to make purchase decisions based on cost and practicality.
Number Sense, Properties, and Operations
- Make both relative (multiplicative) and absolute (arithmetic) comparisons between quantities. Multiplicative thinking underlies proportional reasoning
Proportional reasoning involves comparisons and multiplicative relationships among ratios
Use proportional relationships to solve multistep ratio and percent problems.