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Unit 4 - Lesson 16 - Grade 3: Illustrative Mathematics

Last updated 9 months ago
27 questions
Note from the author:
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®
Lesson: Multiply Numbers Larger than 20

Number Talk: Three Times Some Numbers (Warm Up)

Find the value of each expression mentally.
1

3 x 10

1

3 x 20

1

3 x 50

1

3 x 25

4 x 23 Represented

Here is how Clare and Andre represented 4 x 23.

1

How does each diagram show 4 x 23?

1

How could we use Clare’s diagram to find the value of 4 x 23?

1

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.




1

What do you notice about the numbers in his diagrams?

1

Which diagram would you use to find the value of 4 x 23?

1

Explain your reasoning.

1

Find the value of 3 x 28. Show your thinking using diagrams, symbols, or other representations.

Some Fine Products

1

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.

1

Find the value of the product. Show your reasoning.

3 x 32

1

Find the value of the product. Show your reasoning.

2 x 43

1

Find the value of the product. Show your reasoning.

4 x 22

1

Find the value of the product. Show your reasoning.

3 x 29

Play Close to 100, Multiplication (Optional)

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.

Game 1

1
Round 1

_______ x 1 _______ = _______
1
Round 2

_______ x 1 _______ = _______
1
Round 3

_______ x 1 _______ = _______
1
Round 4

_______ x 1 _______ = _______
1
Round 5

_______ x 1 _______ = _______

Game 2

1
Round 1

_______ x 1 _______ = _______
1
Round 2

_______ x 1 _______ = _______
1
Round 3

_______ x 1 _______ = _______
1
Round 4

_______ x 1 _______ = _______
1
Round 5

_______ x 1 _______ = _______
Cool Down: Multiply Numbers Greater than 20
1

What’s the value of 4 x 24? Explain or show your reasoning.