Georgia 6.NR.4.5
The Standard
Solve unit rate problems including those involving unit pricing and constant speed.
Georgia's K-12 Mathematics Standards · Solve a variety of contextual problems involving ratios, unit rates, equivalent ratios, percentages, and conversions within measurement systems using proportional reasoning.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students find how much something costs, travels, or changes for one unit. They divide in the correct order, label the rate, and use it to compare situations.
What Mastery Looks Like
- Students correctly divide two related quantities to find a rate for one unit. They label answers such as dollars per ounce or miles per hour and use them to compare choices.
Common Misconceptions
- Students may divide in the wrong order, such as finding ounces per dollar when cost per ounce is requested. They may compare total prices or distances instead of using a common unit. Some omit units or assume the greater distance means the greater speed.
How to Assess It
- Exit ticket: A car travels 156 miles in 3 hours, and 12 ounces of cereal costs $3.24. Find each unit rate and label its units.
Lesson moves
Ways to Teach It
Give pairs grocery ads and calculators; have them compute cost per ounce, label units, and choose the better buy.
Ask, “Two cyclists travel different distances and times. How can you decide who is faster?” Students explain using miles per hour.
Play Unit Rate Match with cards showing ratios, unit rates, and matching situations; students justify each match before keeping it.
Use bus schedules to calculate average miles per hour, then compare routes and explain why the faster rate may not arrive first.
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Related Standards
- 6.NR.4
Solve a variety of contextual problems involving ratios, unit rates, equivalent ratios, percentages, and conversions within measurement systems using proportion...
- 7.PAR.4.1
Compute unit rates associated with ratios of fractions, including ratios of lengths, areas and other quantities measured in like or different units presented in...
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Determine the unit rate (constant of proportionality) in tables, graphs (1, r), equations, diagrams, and verbal descriptions of proportional relationships to so...
- 5.NR.3.6
Model and solve problems involving division of a unit fraction by a whole number and a whole number by a unit fraction.
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