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Cogito

Consumer Math · Chapter 5 · Lesson 3

Practice Worksheet

Comparison Shopping

Unit price, discounts, and the offers that are not.

12 problems · about 20 minutes · TEKS M.M.5.C

NameDate

Figure — use these to answer the problems

Unit price for three package sizes. The largest package does not always give the lowest bar.
Small50
Medium42
Large45
Small, cents per unit50
Medium, cents per unit42
Large, cents per unit45
Figure 1

Warm Up

Straightforward practice. Get the method working first.

5 problems

  1. $15 for 5 kg. Price per kg in dollars?

    Answer

  2. Is 20% off then 10% off the same as 30% off?

    • No, it is 28% off, because the second applies to a smaller price.
    • Yes, the discounts add.

  3. $9 for 3 kg. Price per kg in dollars?

    Answer

  4. $10 for 4 kg. Price per kg in dollars?

    Answer

  5. $100 item at 25% off. Final price in dollars?

    Answer

Build It Up

The same ideas with more to keep track of.

3 problems

  1. $80 item at 10% then 10% off. Final price in dollars?

    Answer

  2. 30% off $200. Saving in dollars?

    Answer

  3. 50% off $100. Saving in dollars?

    Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

4 problems

  1. Put the steps for comparing two package sizes in order.

    Write 1 to 4 in the boxes to put these in order.

    • Note the price and quantity of each package.
    • Divide price by quantity for each.
    • Compare the two unit prices.
    • Check you will actually use the larger amount.

  2. $12 for 5 litres. Price per litre, to two decimal places?

    Answer

  3. The Unit Price

    $6 for 4 litres. Price per litre, in dollars?

    Answerdollars

  4. The Double Discount

    A $200 item at 20% off then 10% off. Final price in dollars?

    Answerdollars