G4 Math - Module 3 Lesson 22

Multiple Choice

Which of the following numbers is a prime number?

• 12

• 15

• 17

• 21

Open Ended

Why is it important to understand the difference between prime and composite numbers?

Multiple Choice

Which division expression matches the area model shown with 2, 60, and 8?

• 68 ÷ 2

• 60 ÷ 2 + 8 ÷ 2

• 2 ÷ 60 ÷ 8

• (60 + 8) ÷ 2

Open Ended

Explain how the distributive property is used to solve the division problem in the area model shown.

Multiple Choice

Which of the following is the correct way to split 93 ÷ 3 using the area model and distributive property?

• (90 ÷ 3) + (3 ÷ 3)

• (93 ÷ 3) + (0 ÷ 3)

• (90 ÷ 3) × (3 ÷ 3)

• (93 ÷ 1) ÷ 3

Open Ended

Write the division problem that corresponds to the multiplication equation 6 × 3 = 18.

Multiple Choice

Which of the following equations demonstrates finding an unknown factor using division?

• 4 × 4 = 16

• 16 ÷ 4 = 4

• 6 × 7 = 42

• 40 × 2 = 80

Open Ended

How can you use division to find the unknown factor in a multiplication equation?

Multiple Select

Which numbers should be placed in the blanks to make the equations true: 6 × ___ = 42 and 6 × ___ = 54?

• 6

• 7

• 8

• 9

Multiple Choice

What is the complete multiplication sentence for 40 x 20 in unit form?

• 4 tens x 2 tens = 8 hundreds

• 4 tens x 2 tens = 8 tens

• 40 x 20 = 800

• 4 tens x 20 tens = 80 hundreds

Open Ended

Explain how you would mentally solve 30 x 30 using unit form.

Multiple Choice

Which of the following multiplication sentences is correct for 40 x 3 in unit form?

• 4 tens x 3 ones = 12 tens

• 4 ones x 3 tens = 12 tens

• 40 ones x 3 ones = 120 ones

• 4 tens x 3 tens = 12 hundreds

Multiple Choice

What strategy was used to find the unknown factor in the equation 8 x ___ = 96?

• Area model and decomposition

• Repeated addition

• Guess and check

• Subtraction

Multiple Choice

Which multiplication sentence is represented by the array of 8 blue circles in a single row?

• 1 × 8 = 8

• 2 × 4 = 8

• 4 × 2 = 8

• 8 × 1 = 8

Open Ended

Explain how the multiplication sentence 1 × 8 = 8 is represented by the array of blue circles. What do the factors and product mean in this context?

Multiple Choice

Which multiplication sentence is represented by the array of 2 rows with 4 green circles in each row?

• 2 × 4 = 8

• 1 × 8 = 8

• 4 × 2 = 8

• 8 × 1 = 8

Open Ended

Record the multiplication sentences for each array shown. How do the factors and products compare between the two arrays?

Open Ended

What is one thing you learned today about factor pairs, prime numbers, or composite numbers that you found interesting or surprising?