*Contributor: Erika Wargo. Lesson ID: 12541*

You buy a dozen donuts, and you and your friend each take 1/2, then another friend takes 2/3 of yours. How many do you have left? What is 2/3 of 1/2 of 12? Learn the easy way to multiply fractions!

categories

subject

Math

learning style

Visual

personality style

Otter

Grade Level

Intermediate (3-5)

Lesson Type

Skill Sharpener

At the baseball game, you and your friend each order a pizza. The pizzas are the same size, but sliced differently. Your pizza is cut into 12 slices and your friend’s pizza is cut into 8 slices.

- If each of you ate half of your own pizza, how many slices did each of you eat?
- Who ate more slices of their pizza?

When adding and subtracting fractions, you count same-size parts by having a *common denominator*.

When multiplying fractions, the sizes of the parts change. You are taking part of a part of something.

Watch a short video below to review multiplying fractions and write down the answers to these questions:

- When multiplying fractions, do the denominators need to be the same?
- What is the procedure for multiplying fractions?
- What word found in word problems means "to multiply"?

Discuss the questions above after you have watched *Math Antics - Multiplying Fractions*:

Now, discuss and solve the question from the beginning of the lesson with a parent or teacher:

At the baseball game, you and your friend each order a pizza. The pizzas are the same size, but sliced differently. Your pizza is cut into 12 slices and your friend’s pizza is cut into 8 slices.

- If each of you ate half of your own pizza, how many slices did each of you eat?
- Who ate more slices of their pizza?

Draw a picture to represent the two pizzas. Use your drawing to help you solve the problem.

Discuss with a parent or teacher:

- Based on the pizza example above, why is it important to know the amount that represents the whole? For example, one pizza had 12 slices and the other had 8 slices.
- What happened when you took half of each differently-sliced pizza?
- If you take the same fraction amount of a whole, do you always get an equal amount? Since you found half of each pizza, was the amount of slices the same? Why or why not?

Now, move on to the *Got It?* section to practice multiplying fractions with an interactive game.

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