Objective

By the end of this lesson, you will be able to solve various addition problems, including adding to 10, adding to 20, and adding three numbers.

Materials and Prep

• Computer or tablet with internet access
• Program maths online

Before starting the lesson, make sure you are familiar with the concept of counting and basic addition.

Activities

1. Adding to 10: Practice adding two numbers that sum up to 10. Use manipulatives or draw pictures to help you visualize the addition.
2. Adding to 10 (Counting On): Learn the strategy of counting on when adding to 10. Start with the larger number and count on the remaining amount.
3. Rolling Dice: Roll two dice and add the numbers together. Use a number line or objects to help you find the sum.
4. Adding to 20: Extend your addition skills by adding two numbers that sum up to 20. Use the same strategies as before.
5. Adding to 20 (Counting On): Apply the counting on strategy to addition problems with numbers up to 20.
6. Number Line Addition: Use a number line to solve addition problems. Practice adding numbers with the help of a number line.
7. Single Digit Missing Numbers: Solve addition problems where one of the addends is missing. Fill in the missing number to find the sum.
8. Adding Three Numbers: Learn how to add three numbers together. Start with two numbers and then add the third number.

First Grade Talking Points

• "Today, we are going to have fun with addition! We will practice adding numbers together to find the sum."
• "We will start by adding numbers up to 10. Can you think of some numbers that add up to 10?"
• "When adding to 10, we can use the counting on strategy. Let's try it together."
• "Now, let's roll the dice and add the numbers we get. Remember to use objects or a number line to help you."
• "Great job! Now, let's challenge ourselves and add numbers up to 20. Can you find some pairs of numbers that add up to 20?"
• "Just like before, we can use the counting on strategy for adding to 20. Let's practice!"
• "A number line can also be a helpful tool for addition. Let's try using a number line to solve some addition problems."
• "Sometimes, one of the numbers in an addition problem is missing. Can you fill in the missing number to find the sum?"
• "Lastly, we will learn how to add three numbers together. It's just like adding two numbers, but with an extra step."
• "Great job today! Remember to practice these addition skills and have fun with math!"