Amazing Addition and Subtraction Skills

• newEditor
• Math
• Primary Education
• Age 7-10

Amazing Addition and Subtraction Skills

What do you already know about adding and subtracting?

Learning Objective

At the end of the lesson you will be able to solve addition and subtraction problems and explain your thinking.

What are Addition and Subtraction?

Addition means putting things together. Subtraction means taking things away. We use these in everyday life!

Addition: The Basics

When we add, we find out how many we have in total by joining groups together.

Subtraction: The Basics

When we subtract, we take some away and see how many are left.

Addition Vocabulary

Important words: add, more, total, sum, in all, altogether.

Subtraction Vocabulary

Important words: subtract, minus, difference, take away, less, left over.

Using a Number Line

A number line helps us see how numbers get bigger or smaller when we add or subtract.

Addition Example

If you have 4 apples and get 3 more, how many in total? 4 + 3 = 7 apples.

Subtraction Example

If you have 6 candies and eat 2, how many are left? 6 - 2 = 4 candies.

Addition and Subtraction Signs

The minus sign means 'take away'.

Addition (+)

The plus sign means 'add' or 'more'.

Subtraction (-)

Mental Math Tricks

You can add or subtract in your head by counting on, breaking up numbers, or using number bonds.

Fact Families

Fact families show how numbers are related. For example, 4+3=7, 3+4=7, 7-4=3, 7-3=4.

Zero in Addition and Subtraction

Adding zero keeps the number the same. Subtracting zero also does not change the number.

Addition in Real Life

We use addition when shopping, counting friends, or collecting objects.

Subtraction in Real Life

We use subtraction when giving things away or sharing with others.

Key Tips for Solving Problems

1. Read carefully. 2. Look for keywords. 3. Use tools like number lines or drawings.

Practice: Addition

Try this: What is 5 + 2? Count on your fingers if needed!

Practice: Subtraction

Try this: What is 8 - 3? Draw a picture if it helps!

Reflection

What new things did you learn about addition and subtraction today?

Write down 3 things you learned in this lesson.

Write down 2 things you want to know more about.

Ask 1 question about something you haven't quite understood yet.