Stage: 2 Challenge Level: 
You could look for an order of the letters that you haven't got
yet. Is it possible?
Have you got a system for making sure you find all the ways?
Have you got a system for making sure you find all the ways?
Working systematically. Compound transformations. Practical Activity. Addition & subtraction. Interactivities. Tangram. Multiplication & division. Investigations. Visualising. Combinations.
Published March 2000.
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