#### Practice Addition and Subtraction Long

##### Difficulty:

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Getting started with multiple and nested addition and subtraction of both positive and negative numbers. Remember to calculate the inner brackets first and that subtracting a negative is the same as adding.

Question: What is 1 + (0 - (1 + 1))?

So we do the innermost brackets first 1 + (0 - 2)

This becomes 1 + -2

Answer is -1