Adding Three-Digit Numbers Made Easy

• Nieuwe lesbewerker
• Math
• Primary Education
• Age 7

Adding Three-Digit Numbers Made Easy

What do you already know about adding big numbers?

Learning Objective

At the end of the lesson you will be able to add together three-digit numbers using the column method.

Parts of a Three-Digit Number

The second digit is tens. The last digit is ones.

The first digit from the left shows the number of hundreds.

Hundreds

Tens & Ones

Step 1: Place the Numbers

Write the numbers in columns: hundreds, tens, and ones.

Step 2: Add the Ones

Start with the ones column. If you make 10 or more, carry over to the tens.

Step 3: Add the Tens

Now add the tens. Remember to include anything you carried over from the ones.

Step 4: Add the Hundreds

Lastly, add the hundreds column. That's all there is to it!

Let's Practise Together

Try adding 236 + 158. Write your answer on paper. What did you get?

Reflection Time

How do you feel about adding three-digit numbers now? What steps will help you remember for next time?

Write down 3 things you learned in this lesson.

Write down 2 things you want to know more about.

Ask 1 question about something you haven't quite understood yet.

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