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6th grade · Math · Unit 16 of 17

Unit Rates

Price per item, miles per hour

What your child practices

Finding unit rates and unit prices, choosing the better buy, completing rate tables, and converting measurement units with ratios.

Arizona Academic Standards learning standard: 6.RP.A.2; 6.RP.A.3 · finding unit rates, using rate tables, and converting measurement units with ratio reasoning

How we explain it

Children can open this short lesson before they practice.

  1. A unit rate is the amount for 1.
  2. Divide the total by the number of units.
  3. Compare unit prices to find the better buy.

Example: 4 notebooks cost $6.00. What is the price of one? $6.00 ÷ 4 = $1.50. Answer: $1.50

Unit Rates in Arizona

In the Arizona Academic Standards, this is unit 16 of 17 in 6th grade Math, after Four Quadrants and before Nets & Surface Area.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Arizona Department of Education

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Which is the better buy for granola bars: 3 for $4.50 or 6 for $12.00?

    • 6 for $12.00
    • 3 for $4.50

  2. Question 2

    5 notebooks cost $7.50. What is the price of one notebook?

    • $1.50
    • $1.25
    • $0.75
    • $2.25
    • $2.50

  3. Question 3

    The table shows a constant rate. What number goes where the ? is?

    HoursDollars earned
    212
    318
    636
    8?
    • 49
    • 14
    • 48
    • 36
    • 60

  4. Question 4

    There are 16 ounces in 1 pound. How many ounces are in 5 pounds?

    • 81
    • 80
    • 160
    • 82
    • 83

  5. Question 5

    A car drives 75 miles in 3 hours at a steady speed. How many miles per hour is that?

    • 20
    • 25
    • 28
    • 72
    • 10

  6. Question 6

    Which is the better buy for granola bars: 2 for $3.00 or 3 for $3.00?

    • 2 for $3.00
    • 3 for $3.00

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