4-Digit by 1-Digit Multiplication Problems

4-Digit by 1-Digit Multiplication Problems

Unit 3: Multiplication and Division II

Lesson 1

You need to have scratch paper ready!

You may use notebook paper, or grid paper.

The next slide has an example before you try it on your own.

Multiple Choice

Now you try!

1,342 x 4 = ?

• 5,368

• 4,180

• 5,224

• 5,428

Multiple Choice

When solving 1,342 x 4, first we must write 1,342 in expanded form. Which has the correct expanded form?

• 1,000 + 30 + 40 + 2

• 1 + 3 + 4 + 2

• 1,000 + 300 + 4 + 2

• 1,000 + 300 + 40 + 2

Multiple Choice

Next we must find our partial products. First, we can multiply 1,000 x 4. What is the product of 1,000 x 4?

• 40,000

• 4,000

• 400

• 40

Multiple Choice

Next we must find the partial product in the hundreds place. We multiply 300 x 4. What is the product of 300 x 4?

• 1,200

• 120

• 12,000

• 900

Multiple Choice

Next we must find the partial product in the tens place. We multiply 40 x 4. What is the product of 40 x 4?

• 16

• 160

• 1,600

• 58

Multiple Choice

Next we must find the partial product in the ones place. We multiply 2 x 4. What is the product of 2 x 4?

• 6

• 8

• 3,290

• hamburger

Fill in the Blank

Finally, we will find the sum of our partial products. What is the sum of 4,000 + 1,200 + 160 + 8