Unit 10, Lesson 3
Multiply a Fraction by a Fraction
Look at the math problem below. Is the work correct? Write a brief explanation to defend your reasoning.
Learning objective: "I can multiply a fraction by another fraction." What is your current scale of understanding for this skill?
- 1) I'm confused about this skill.
- 2) I'm still learning this skill.
- 3) I understand this skill.
- 4) I could teach this skill.
TAKE NOTE: 1) Multiply the numerators. 2) Multiply the denominators. 3)Simplify the fraction.
How to Multiply a fraction by a fraction.
Denominator is a Latin word meaning "that which names." The denominator names the partition that the fraction is representing (aka how many parts the whole is broken into).
Sol's mother gives him 2/3 of a piece of raisin toast. He eats 1/4 of what she gives him. What fraction of the whole piece of toast did Sol eat? Work in pairs. Solve the problem using a model or an algorithm to defend your reasoning. 🍞
What is the SIMPLIFIED product of 3/4 x 2/3?
On Sunday Tom Hanks used 3/4 of a bag of oranges to make fresh orange juice. On Monday, he used 2/5 as many oranges as on Sunday. In simplest form, how many bags of oranges did he use on Monday?
Discuss in your groups. When you are done, please give me a back-to-back silent signal as you get ready to share your thoughts.
Joelle thinks that the product of 7/8 x 3/10 is greater than the product of 3/8 x 7/10. How do you respond to Joelle's thinking?
Tabitha and Ally are putting together a puzzle.They have 3/5 of the puzzle completed. If Tabitha put 1/2 of the partly-finished puzzle together, what fraction of the whole puzzle did she put together?
Write an example of multiplying two fractions of your own choosing, and find a solution. Then write a word problem that fits your problem.
Amaury Guichon is making a chocolate sculpture. His original chocolate recipe for a 3 foot sculpture calls for 16/8 pound of melted bittersweet chocolate. If he wants to make a sculpture that is 1/3 the size, how many pounds of melted bittersweet chocolate will he need? Solve the problem and simplify. Then, draw a picture a sculpture you think Chef Guichon made.
To multiply a fraction by a fraction, multiply the numerators and multiply the denominators. Then, reduce the fraction into its simplest form.
Show me your final scale of understanding for the today's objective: " I can multiply a fraction by another fraction."
- 1: Even with help and support, I do not understand.
- 2: Starting to understand but still confused.
- 3: I can do this with help or an example in front of me.
- 4: I can do this independently.
- 5: I am confident and I can teach someone.
Share ONE adjective to describe your understanding. Then write ONE thing that I can do to help your understanding grow. Please include a question you might have for me as well.