Grade 3 Unit 4
Lesson 16: Multiply Numbers Larger than 20
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 4
Lesson 16: Multiply Numbers Larger than 20
CC BY 2021 Illustrative Mathematics®
Find the value of each expression mentally.
3 x 10
3 x 20
3 x 50
3 x 25
Here is how Clare and Andre represented 4 x 23.
How does each diagram show 4 x 23?
How could we use Clare’s diagram to find the value of 4 x 23?
How could we use Andre’s diagram to find the value of 4 x 23?
Diego tried different ways to partition or split a diagram to help him find the value of 4 x 23.
What do you notice about the numbers in his diagrams?
Which diagram would you use to find the value of 4 x 23?
Find the value of 3 x 28. Show your thinking using diagrams, symbols, or other representations.
To find the value of 2 x 37, Mai started by writing this equation:
2 x 30 = 60
Describe or show what Mai would do to finish finding the value of 2 x 37.
Find the value of the product. Show your reasoning.
3 x 32
Find the value of the product. Show your reasoning.
2 x 43
Find the value of the product. Show your reasoning.
4 x 22
Find the value of the product. Show your reasoning.
3 x 29
Play Close to 100, Multiplication with a partner.
1. Place the cards face down.
2. Each player draws 4 cards.
3. Each player chooses 2 cards to complete the expression to make a value as close to 100 as possible. Write the 2 digits and the product.
4. Player closest to 100 wins.
5. Play 5 rounds. Player who wins the most rounds wins.
Round 1
Round 2
Round 3
Round 4
Round 5
Round 1
Round 2
Round 3
Round 4
Round 5
What’s the value of 4 x 24? Explain or show your reasoning.
Explain your reasoning.
