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Unit 04 · Rates and PercentsLesson

Day 047Using a Unit Rate

LearnClassworkAnswer keyPDF packet ↗
Standards 6.RP.A.26.RP.A.3b
LEARNING TARGET

I can find a unit rate and explain its units.

01 · LEARN

Build the idea

A unit rate compares an amount with one unit of another quantity. Divide the first quantity by the second. Write the units, such as dollars per notebook, so you know what the quotient means.

WORKED EXAMPLE 1

4 identical notebooks cost $20. Find the cost per notebook.

$5 per notebook

Unit rate = 20 ÷ 4 = 5 dollars per notebook.

WORKED EXAMPLE 2

2 identical notebooks cost $7. Find the cost per notebook and the cost of 5 notebooks at this rate.

$3.5 per notebook; $17.5

Unit rate = 7 ÷ 2 = 3.5 dollars per notebook.

02 · PRACTICE

Your turn

Work in order. Start with the foundations, then build toward explanation and application.

  1. 4 identical notebooks cost $32. Find the cost per notebook.

  2. 4 identical notebooks cost $8. Find the cost per notebook.

  3. 6 identical notebooks cost $30. Find the cost per notebook.

  4. 6 identical notebooks cost $42. Find the cost per notebook.

  5. 2 identical notebooks cost $4. Find the cost per notebook.

  6. 3 identical notebooks cost $15. Find the cost per notebook.

  7. 7 identical notebooks cost $24.5. Find the cost per notebook and the cost of 10 notebooks at this rate.

  8. 4 identical notebooks cost $4. Find the cost per notebook and the cost of 7 notebooks at this rate.

  9. 4 identical notebooks cost $10. Find the cost per notebook and the cost of 7 notebooks at this rate.

  10. 5 identical notebooks cost $20. Find the cost per notebook and the cost of 8 notebooks at this rate.

03 · CHECK

Answers and reasoning

Reveal the teacher answer key
  1. $8 per notebook

    Unit rate = 32 ÷ 4 = 8 dollars per notebook.

  2. $2 per notebook

    Unit rate = 8 ÷ 4 = 2 dollars per notebook.

  3. $5 per notebook

    Unit rate = 30 ÷ 6 = 5 dollars per notebook.

  4. $7 per notebook

    Unit rate = 42 ÷ 6 = 7 dollars per notebook.

  5. $2 per notebook

    Unit rate = 4 ÷ 2 = 2 dollars per notebook.

  6. $5 per notebook

    Unit rate = 15 ÷ 3 = 5 dollars per notebook.

  7. $3.5 per notebook; $35

    Unit rate = 24.5 ÷ 7 = 3.5 dollars per notebook.

  8. $1 per notebook; $7

    Unit rate = 4 ÷ 4 = 1 dollars per notebook.

  9. $2.5 per notebook; $17.5

    Unit rate = 10 ÷ 4 = 2.5 dollars per notebook.

  10. $4 per notebook; $32

    Unit rate = 20 ÷ 5 = 4 dollars per notebook.

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