Stage: 2 Challenge Level: 
Where could you start?
What might the first numbers look like?
What might the last number look like?
What do you know about the multiples of $11$?
What will be the same in each column?
What will be the same for the first nine numbers in each row?
Addition & subtraction. Place value. Interactivities. Visualising. Compound transformations. Working systematically. Combinations. Trial and improvement. Practical Activity. Investigations.
Published September 2009.
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