Question

for each of the situations below, choose the action that will make the calculation work.
in each case, the units for each input and the result are given in parentheses ().
if you dont know what make a conversion factor and use a conversion factor mean in the pull - down menus, click the check answers button and read the concepts lesson.
steve wants to buy several pints of strawberries and sees that they are on sale for a good price. choose the action that steve should use to calculate the total cost of the strawberries.
cost per pint ($/pint)
pints bought (pints)
total cost ($)
gavin wants to calculate how much air pressure he lost in his tires after he drove from denver to houston. choose the action that gavin should use to do this calculation.
tire pressure in denver (psi)
tire pressure in houston (psi)
air pressure lost (psi)
alyssa want to estimate how long it will take her in total to prepare and bake a cake. choose the action that alyssa should use to do this calculation.
baking time (min)
preparation time (min)
total time (min)
a teacher has a big sheet of stickers to share with her classroom and wants to know how many stickers each child will get if they are shared equally. choose the action that the teacher should use to do this calculation.
students (students)
total stickers (stickers)
stickers per student (stickers/student)
selma bought a box of books for her book store a few weeks ago. several of the books have been purchased and she wants to know how many books are left. choose the action that selma should use to do this calculation.
books purchased (books)
books remaining (books)

Explanation:

Step1: Match operation to cost calculation

Total cost = Cost per pint × Pints bought
$\text{Total cost (\$)} = \frac{\$}{\text{pint}} \times \text{pints}$

Step2: Match operation to pressure loss

Pressure lost = Denver pressure - Houston pressure
$\text{Air pressure lost (psi)} = \text{psi}_\text{Denver} - \text{psi}_\text{Houston}$

Step3: Match operation to total time

Total time = Prep time + Baking time
$\text{Total time (min)} = \text{min}_\text{prep} + \text{min}_\text{baking}$

Step4: Match operation to stickers per student

Stickers per student = Total stickers ÷ Number of students
$\frac{\text{stickers}}{\text{student}} = \frac{\text{total stickers}}{\text{number of students}}$

Step5: Match operation to remaining books

Remaining books = Total books - Purchased books
$\text{Books remaining (books)} = \text{Total books} - \text{Books purchased}$

Answer:

1. Multiply the two values
2. Subtract the Houston pressure from the Denver pressure
3. Add the two values
4. Divide total stickers by number of students
5. Subtract the purchased books from the total books (note: the input for total books is cut off, but the operation is subtraction of purchased books from initial total)