Exploring Numbers: One More and One Less

Exploring Numbers: One More and One Less

Learning Objective

At the end of the lesson, you will understand the ‘one more than/one less than’ relationship between consecutive numbers.

What do you already know about numbers getting bigger or smaller?

Recap: Number Lines

Number lines help us see numbers in order. Can you point where numbers get bigger or smaller?

Counting Together

Let's count from 1 to 10 together. Which direction do numbers get bigger?

One More Than

If you have 3 apples, what's one more? 3 + 1 = 4!

One Less Than

If you have 5 oranges, what's one less? 5 - 1 = 4!

Using a Number Line

Find 6 on the number line. What’s one more? What’s one less?

Comparing Numbers

Look at 4 and 5 on the line. Which is more? Which is less?

Explain Your Thinking

Tell us how you found out which number is more or less.