Video: Solving Division Word Problems Involving Measurements of Length

James used 12 ounces of flour to make the dough for 3 pizzas. How many ounces of flour are needed to make 1 pizza?

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Video Transcript

James used 12 ounces of flour to make the dough for three pizzas. How many ounces of flour are needed to make one pizza?

Let’s identify the key information as we try to work out what the problem is asking us. So James is making pizzas. And he finds that if he uses 12 ounces of flour, he’s able to make three pizzas. And the question asks us to find the amount of flour that James will need if he only wants to make one pizza instead.

Let’s sketch a bar model to help us see how to find the answer. There’s our one bar and it represents the 12 ounces of flour that James has used. And by splitting it into three, this represent the three pizzas that James makes. So the question is really asking us to identify the value of one of our bars. How many ounces of flour needed to make one pizza?

To find the answer, we need to split 12 ounces into three equal parts or divide. This is a division question. If we split the number 12 into three equal groups, how many will be in each group?

Here are three groups. Let’s split 12 equally between them: one, two, three, four, five, six, seven, eight, nine, 10, 11, 12. Therefore, in each group, 12 divided by three equals four. And so we can use this information to relabel our bar model. And we can see the answer to the problem: James will need four ounces of flour to make one pizza.

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