Stage: 1 Challenge Level: 
Try using cards numbered from $0$ - $9$ or even pieces of torn paper.
Where is the best place to put $1$ when you are aiming for the highest number?
Where is the best place to put $9$ when you are aiming for the lowest number?
Practical Activity. Trial and improvement. Tangram. Interactivities. Addition & subtraction. Investigations. Visualising. Multiplication & division. Place value. Compound transformations.
Published February 2009.
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