Stage: 1 Challenge Level: 
How will you know you have found all the different number sentences?
Are there any other sums that have the $8$ in them, for example?
Are there any other addition sums?
Can you make any number sentences with all four numbers?
You could print out these cards.
Working systematically. Multiplication & division. Trial and improvement. Visualising. Interactivities. Practical Activity. Investigations. Combinations. Digit cards. Addition & subtraction.
Published June 2000.
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