Numbers below zero are called negative numbers. Numbers above zero are called whole numbers. There are rules you can use if adding, subtracting, multiplying or dividing positive and negative numbers.

Any number above zero is a **positive** number. Positive numbers are written with no sign or a ' ' sign in front of them and they are counted up from zero to the right on a number line.

Any number below zero is a **negative** number. Negative numbers are always written with a ' ' sign in front of them and they are counted down from zero to the left on a number line.

Always look at the sign in front of a number to see if it is positive or negative.

Zero, , is neither positive nor negative.

Positive numbers get higher the further we move right, so 5 is more than 2. Negative numbers get lower the further we move left, so -5 is less than -2.

- Question
Which word, 'higher' or 'lower', would fit correctly in each of these gaps?

a) is ......... than

b) is ......... than

c) is ......... than

a) is lower than

b) is higher than

c) is lower than

Now test what you've learnt about negative numbers in the activity below.