Mastering One Digit by Two Digit Multiplication

The video tutorial teaches how to multiply one-digit numbers by two-digit numbers using area models and place value. It provides examples with numbers like 7x32, 3x47, and 5x39, demonstrating the breakdown of two-digit numbers into expanded form and using multiplication tricks. The tutorial emphasizes checking the reasonableness of answers through estimation.

What is the first step in multiplying one-digit by two-digit numbers using area models?

• Subtracting the numbers

• Drawing a number line

• Adding the numbers together

• Using place value to split the two-digit number

Tags

CCSS.4.NBT.B.5

In the example of 7 x 32, what is the expanded form of 32?

• 20 + 12

• 30 + 2

• 32 + 0

• 3 + 29

Tags

CCSS.4.NBT.B.5

What is the result of 7 x 30 in the area model for 7 x 32?

• 210

• 21

• 30

• 70

Tags

CCSS.4.NBT.B.5

What is the final result of 7 x 32 using the area model?

• 320

• 14

• 210

• 224

Tags

CCSS.4.NBT.B.5

In the example of 3 x 47, what is the expanded form of 47?

• 40 + 7

• 30 + 17

• 47 + 0

• 4 + 43

Tags

CCSS.4.NBT.B.5

What is the result of 3 x 40 in the area model for 3 x 47?

• 120

• 40

• 30

• 12

Tags

CCSS.4.NBT.B.5

What is the estimated result of 3 x 47?

• 141

• 150

• 120

• 200

Tags

CCSS.4.NBT.B.5

In the example of 5 x 39, what is the expanded form of 39?

• 39 + 0

• 3 + 36

• 30 + 9

• 20 + 19

Tags

CCSS.4.NBT.B.5

What is the result of 5 x 30 in the area model for 5 x 39?

• 30

• 15

• 150

• 50

Tags

CCSS.4.NBT.B.5

What is the final result of 5 x 39 using the area model?

• 200

• 45

• 195

• 150

Tags

CCSS.4.NBT.B.5