Objective
By the end of this lesson, you will be able to confidently use mental and written strategies for adding and subtracting 2 and 3 digit numbers.
Materials and Prep
- Paper
- Pencil
- Your thinking cap!
No special preparation needed, just come ready to have fun with math!
Activities
- Mental Math Challenge: Let's start by practicing adding and subtracting 2-digit numbers in our heads. I'll give you some problems to solve mentally.
- Math Race: We'll have a race to solve 3-digit addition problems on paper. The first one to get the correct answer wins!
- Math Story Problems: I'll give you some fun story problems involving adding and subtracting 2 and 3 digit numbers. Let's solve them together!
Talking Points
- Adding and Subtracting: "When we add numbers, we put them together to find the total. When we subtract numbers, we take away one number from another."
- Mental Strategies: "Sometimes it's faster to solve math problems in our heads. We can use strategies like breaking numbers into tens and ones to make it easier."
- Written Strategies: "When we have bigger numbers to add or subtract, we can use paper and pencil to help us keep track of the numbers and carry over when needed."
- Practice Makes Perfect: "The more we practice, the better we get at math! Don't worry if you make mistakes, that's how we learn and improve."