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.

Revise how to add, subtract, multiply and divide negative numbers using the correct order of operations (BIDMAS) and how to work this out on a calculator.