7.05 Story problems with measurement
Are you ready?
Do you remember how to convert units of length? Let's try this problem to practice.
Convert $7$7 meters to centimeters.
$7$7 m = $\editable{}$ cm
Learn
Let's review how to find keywords in story problems so we know which operation we need to do.
question 1
Buzz buys a $4000$4000 g box of washing powder.
If he uses $2$2 kg of the washing powder, how many grams of powder is left in the box?
Learn
Let's see if we can find some clues for multiplication and division in this video.
Question 2
A whale is $8$8 yards long.
What is the length of the whale in feet?
The whale is traveling in a pod of $20$20 whales. Use the length of the whale to estimate the length of the whole pod in feet.
Learn
If we want to add, subtract, multiply, or divide measurements, we need to first make sure that all the measurements are in the same units. To do this, we can use the different relationships:
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Apply
Question 3
Find the value of
$8$8 hours $-$− $40$40 minutes
$\editable{}$ hours $\editable{}$ minutes
When we have a story problem, we need to think about the story, and use the keywords to work out which operators to use. Some words that we may find in a story could be:
| addition | subtraction | multiplication | division |
|---|---|---|---|
| more | less | groups of | equally share |
| add | take away | product | each |
| give | take | times | equal groups |
| arrive | leave | total | per |