Stage: 1 Challenge Level: 
Amy sent us the ways she found to arrange the carriages. She was very systematic, so she can be sure that she has found all the arrangements. Can you see how she did this?
Working systematically. Trial and improvement. Visualising. Factors and multiples. Combinations. Interactivities. Multiplication & division. Practical Activity. Addition & subtraction. Investigations.
Published March 1999.
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