Objective

By the end of this lesson, you will be able to identify tens, perform addition of larger numbers, subtract numbers up to 10, subtract numbers up to 10 using hands, find the difference between two groups, determine how many more are in one group compared to another, and subtract numbers up to 20.

Materials and Prep

• Pen or pencil
• Blank paper
• Counting objects (e.g., buttons, coins, small toys)

Activities

1. Looking for Tens:

   Go on a scavenger hunt around your house and find objects that come in groups of ten. Count and write down how many groups of ten you find.

2. Addition of Larger Numbers:

   Practice adding larger numbers by using the objects you found in the previous activity. Create number sentences and solve them using the objects as manipulatives.

3. Subtracting up to 10:

   Write down subtraction problems with numbers up to 10 and solve them using mental math or drawing pictures.

4. Subtracting up to 10 (Using Hands):

   Use your hands to solve subtraction problems up to 10. For example, if you have 7 fingers up and you put down 3 fingers, how many fingers are left up?

5. Difference Between Two Groups:

   Take two groups of objects (e.g., buttons) and find the difference in the number of objects between the two groups. Write down the subtraction sentence to represent the difference.

6. How Many More?:

   Compare two groups of objects and determine how many more objects are in one group compared to the other. Write down the subtraction sentence to represent the difference.

7. Subtracting up to 20:

   Practice subtracting numbers up to 20 by solving subtraction problems using mental math, drawing pictures, or using objects as manipulatives.

First Grade Talking Points

• "Today, we will be learning about tens and how to identify them."
• "We will also practice adding larger numbers using objects as manipulatives."
• "Subtracting up to 10 is easy! We can use mental math or draw pictures to help us."
• "Did you know that you can use your hands to solve subtraction problems up to 10? Let's give it a try!"
• "We will learn how to find the difference between two groups of objects and determine how many more are in one group compared to the other."
• "Lastly, we will practice subtracting numbers up to 20. It's just like subtracting smaller numbers, but we might need to use a little more thinking."