| Full lesson | Create for a teacher a set of content for giving a lesson, beginning with the lesson plan. Each new block of materials must begin with an H1 heading (other subheaders must be H2, H3, etc). When you describe required pictures, write those descriptions in curly brackets, for example: {A picture of a triangle} |
| Which subject | Mathematics |
| What topic | adding three numbers within 1000 |
| What length (min) | 30 |
| What age group | Year or Grade 3 |
| Class size | 20 |
| What curriculum | |
| Include full script | |
| Check previous homework | |
| Ask some students to presents their homework | |
| Add a physical break | |
| Add group activities | |
| Include homework | |
| Show correct answers | |
| Prepare slide templates | |
| Number of slides | 5 |
| Create fill-in cards for students | |
| Create creative backup tasks for unexpected moments |
Adding Three Numbers within 1000
Year/Grade 3
Mathematics
20 students
This lesson aligns with the Common Core State Standards for Mathematics, specifically:
| Step Number | Step Title | Length (minutes) | Details |
|---|---|---|---|
| 1 | Introduction | 5 | Briefly review two-number addition. Introduce the objective of adding three numbers. |
| 2 | Direct Instruction | 10 | Teach students strategies for adding three numbers. Use examples on the whiteboard. Demonstrate how to group numbers to simplify the process. |
| 3 | Guided Practice | 5 | Lead the class in solving a few problems together. Use counters or base ten blocks to visualize the addition process. |
| 4 | Independent Practice | 5 | Provide each student with an addition worksheet. Allow them to work independently on problems involving three numbers. |
| 5 | Homework Assignment | 2 | Assign homework that reinforces the lesson. Provide instructions on completing the assignment and clarify expectations (without sharing problems). |
| 6 | Closing Review | 3 | Recap key concepts from the lesson. Ask students to share strategies they found helpful during practice. Explain where they can look for support if they have questions on their homework. |
"Good morning, everyone! Today, we're going to dive into a new topic in math: Adding Three Numbers together! Before we start, let’s quickly review what we learned about adding two numbers. Can anyone remind me how we add two numbers? Yes, great job! We just line them up and add them together.
Now, who can guess what we will do with three numbers? That’s right! We will add them together as well! Our goal today is to learn how to add three numbers that total less than 1000. Are you ready to get started?"
"Alright, let’s dive right in! When we add three numbers, we can make it easier by grouping them. For example, let’s take the numbers 235, 462, and 187.
First, I’ll write them on the board:
235
Now, I can group the first two numbers. If I add 235 and 462 together first, I can make the addition easier. Can anyone tell me what 235 plus 462 is?
That’s right! It equals 697. Now, let’s take that result and add the last number, 187.
So, we have 697 plus 187. What do we get when we add those?
Correct! 884.
Always remember, we can simplify the process by taking it step by step and grouping numbers."
"Let’s practice together now! I have some counters and base ten blocks here that will help us visualize the addition.
I’ll write a new set of numbers on the board: 148, 276, and 325.
Now, let’s work together to add these numbers. First, who can tell me how we can group these? Yes! Let’s add 148 and 276 first. What do we get?
Exactly! We get 424.
Now, let’s add 424 and 325 together. Can anyone tell me the total?
That’s right, it’s 749! Great job, everyone! You’re doing amazing!"
"Now it’s your turn! I have some addition worksheets for each of you. Each worksheet has a set of problems for you to solve independently, all involving three numbers that total less than 1000.
Please take out your math journals, and when you finish a problem, be sure to check your answers. If you have questions, feel free to raise your hand, and I’ll come around to help."
"Alright, everyone! Before we wrap up today, I’d like to assign some homework. You will take home a worksheet that has problems where you will add three numbers within 1000.
Make sure you read the instructions carefully, and remember, you won’t have to present this homework in class. Just make sure to do your best, because I’ll be collecting it to see how you did!
Are there any questions about the homework?"
"Wow, what a fantastic lesson we had today! Let’s recap what we learned. We practiced adding three numbers together and discovered how to group numbers to make it easier.
Can anyone share a strategy that helped you during our practice?
Excellent! That’s a great strategy.
And remember, if you find yourself stuck while doing your homework, don’t hesitate to ask for help or look for resources.
Great job today, everyone! I can’t wait to see how you do with your homework."
Add the following sets of numbers and show your work:
For each set of numbers below, group them in a way that makes the addition easier. Show your grouping and your calculations:
Write a step-by-step explanation of how you would add the numbers 376, 298, and 125. Be sure to include any grouping strategies you would use.
If you have the numbers 417, 214, and 368, what is their total? Show your work and check your calculations.
Create your own set of three numbers that total less than 1000. Write down the numbers and perform the addition. Explain your process of grouping, if any.
Reflect on the lesson: Why is it helpful to group numbers when adding three numbers together? Write a few sentences describing your thoughts.
Extra Challenge: If you add three numbers together and the result is 657, what could the three numbers be? Create at least two different sets of numbers that add up to 657.