Stage: 2 Challenge Level: 
Do you have a system or way of getting more solutions?
How will you know you have found them all?
How would it help to start with the two-year-old wag worms?
Practical Activity. Investigations. Addition & subtraction. Multiplication & division. Interactivities. Visualising. Combinations. Working systematically. Factors and multiples. Interlocking cubes.
Published June 2000,January 2009.
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