Unit 4: Addition and Subtraction Concepts

Day 28 of 30

Practice mixed addition and subtraction facts to 20

K-2Mathematics

Content is AI-assisted and continuously improved through educator review

Learning Objective

I can practice mixed addition and subtraction facts to 20.

Today's Lesson

Today we will learn how to practice mixed addition and subtraction facts to 20. Math helps us solve problems and understand the world around us.

Addition means putting groups together to find the total. When we see 3 + 2, we start with 3 objects and add 2 more. We can count them all to find the answer: 1, 2, 3... then 4, 5. So 3 + 2 = 5. The "+" symbol means "plus" or "add," and the "=" symbol means "equals" or "the same as."

Let's break this down step by step so it's easy to understand. Follow along with the examples, and don't worry if it takes some practice to get the hang of it!

Remember: Making mistakes is part of learning. If something is tricky, try again, look at the examples, or ask for help.

Key Terms
Addition

Putting numbers together to find the total

Subtraction

Taking away to find how many are left

Activities
Instructions
1. Use objects or pictures to explore practice mixed addition and subtraction facts to 20. 2. Try the examples together. 3. Solve practice problems. 4. Check your work.
Materials Needed
  • Counters or objects
  • Pencil
  • Practice sheet
Practice Problems
1

3 + 2 = ___

Hint: Start at 3 and count up 2 more.
2

5 + 4 = ___

Hint: You can use your fingers or draw pictures.
3

Sam has 4 apples. He gets 3 more. How many apples does Sam have now?

Hint: Add the two groups together.

Teaching Tip

For younger learners: Use concrete objects and hands-on activities when teaching practice mixed addition and subtraction facts to 20. Keep sessions short (10-15 minutes) and incorporate movement or songs when possible.

AI Tutor

Get instant help with this lesson. Ask questions and receive personalized explanations from your AI tutor.