# Multiplying Tens — Let's Practice!

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Multiplying Tens — Let's Practice!
CCSS.MATH.CONTENT.3.NBT.A.3

## Basics on the topicMultiplying Tens — Let's Practice!

Today we are practicing multiplying tens with Razzi! This video contains examples to help you further practice and grow confident in this topic.

### TranscriptMultiplying Tens — Let's Practice!

Razzi says get these items ready, because today we're going to practice multiplying tens. It's time to begin! Solve two times forty. Pause the video to work on the problem, and press play when you are ready to see the solution! Write zero in the ones place, for the placeholder. Two times four equals eight. Two times forty equals eighty. Did you also get eighty? Let's tackle the next problem! Solve three times twenty. Pause the video to work on the problem, and press play when you are ready to see the solution! Write zero in the ones place. Three times two equals six. Three times twenty equals sixty. Did you also get sixty? Here comes the next problem! What is six times thirty? Pause the video to work on the problem, and press play when you are ready to see the solution! Write zero in the ones place. Six times three equals eighteen. Six times thirty equals one hundred eighty. Did you also get one hundred eighty? Let's tackle the final problem! Solve eight times fifty. Pause the video to work on the problem, and press play when you are ready to see the solution! Write zero in the ones place. Eight times five equals forty. Eight times fifty equals four hundred. Did you also get four hundred? Razzi had so much fun practicing with you today! See you next time!

## Multiplying Tens — Let's Practice! exercise

Would you like to apply the knowledge you’ve learned? You can review and practice it with the tasks for the video Multiplying Tens — Let's Practice!.
• ### Multiply and answer the questions.

Hints

The first step when multiplying tens is always to write down the 0 in the final answer.

The hundreds place is the red box.

The tens place is the blue box.

The ones place is the green box.

The placeholder always goes in the ones place.

Solution

1. 0 is the place holder which goes in the ones place of the solution.

2. 3 x 4 = 12. The 1 goes in the hundreds place and the 2 goes in the tens place of the solution.

3. So the final solution is 30 x 4 = 120.

• ### Do you know all the steps to multiply by tens?

Hints

The first step is to fill in the place holder.

When multiplying tens, what number will always be the place holder?

Remember:

The red box is the hundreds place.

The blue box is the tens place.

The green box is the ones place.

Solution

Step 1: Write 0 in the ones place

Step 2: Multiply 4 x 5

Step 3: Write 2 in the hundreds place and 0 in the tens place

Step 4: Read all numbers below the line to get the final answer

• ### Multiply all equations.

Hints

Step one when multiplying tens is always to fill in the 0.

Write it in the ones place shown by the green box.

Next, multiply the non-zero numbers.

Solution

6 x 60 = 360

90 x 2 = 180

40 x 3 = 120

5 x 80 = 400

• ### Multiplication practice.

Hints

Rewrite the problems as shown in the image.

Write the smaller factor, which is 7 in this equation, below the larger one.

Problem number 2 has a three-digit factor of 200.

Because there are two 0s in 200, write two placeholder 0s in the final answer, as shown in the image.

Even with large numbers, follow the same steps to solve the equation.

1. Write the placeholder 0 in the ones place.
2. Multiply the non-zero numbers.
Solution
1. 7 x 80 = 560
2. 4 x 200 = 800
3. 9 x 70 = 630
4. 9 x 90 = 810
5. 8 x 60 = 480
• ### What is 3 x 30?

Hints

The first step is to fill in the place holder 0. It goes in the ones place.

Next, multiply 3 x 3. Write the answer in the tens place.

Solution

3 x 30 = 90

• ### Find the missing factor.

Hints

Simplify the equation by crossing out one zero from the factor and one zero from the product, as shown in the image below.

Let's do problem #1 together.

After crossing out one zero from both the known factor and product, you can find the missing factor in two ways.

1. Divide 21 (the product) by 3 (the factor).

Or

1. Count up from 0 to 21 by threes. How many times did you add 3? That's the missing factor!
Solution
• 7 x 30 = 210
• 8 x 20 = 160
• 6 x 50 = 300
• 4 x 60 = 240