Children are most likely to come across negative numbers when using a calculator and they are usually taught about them in a practical sense in the context of measuring temperature. Number lines are also very helpful as they show that numbers continue after zero when counting down.
Here we have a maths worksheet, suitable for Year 5 children which asks for a series of five numbers, both positive and negative, to be put in order, with the least first. Calculating with negative numbers comes a little later and can cause a great deal of confusion, even in High School!
This can be found in our year 5 Counting and Number section