Positive and negative numbers

Investigate different ways of making £5 at Charlie's bank.

Imagine a very strange bank account where you are only allowed to do two things...

Different combinations of the weights available allow you to make different totals. Which totals can you make?

The picture shows a lighthouse and some underwater creatures. Can you work out the distances between some of the different creatures?

In this game, you can add, subtract, multiply or divide the numbers on the dice. Which will you do so that you get to the end of the number line first?

Substitute -1, -2 or -3, into an algebraic expression and you'll get three results. Is it possible to tell in advance which of those three will be the largest ?

Do you notice anything about the solutions when you add and/or subtract consecutive negative numbers?

Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?