In this KS1 Maths article you'll learn what number lines are and how to add and subtract using them. We also have KS1 Maths videos, a quiz and lots of examples.

3. Get a deck of cards to practice the counting-on strategy. Draw two cards from the deck and add the two numbers of the cards using a number line. Remember to use the biggest number first!

Even if some of the numbers on a number line have been removed, you can still use it to estimate the value of a number. Let's work out what number is shown by the arrow. Step 1 - Look at the range.