4.1.9 - Identify the inputs and outputs required in a solution
4.1.10 - Identify pre-planning in a suggested problem and solution
4.1.11 - Explain the need for pre-conditions when executing an algorithm
4.1.12 - Outline the pre and postconditions to a specified problem
4.1.13 - Identify exceptions that need to be considered in a specified problem solution
Computational thinking - Worksheet 2 - Thinking ahead
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