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Four-digit Targets printable sheet
You have two sets of the digits from $0$ to $9$.
This activity has been adapted from one of BEAM's free Maths of the Month resources, which unfortunately are no longer available. You can play it as a game against a friend using this sheet from BEAM.
This problem would fit in well when members of the group are partitioning, rounding and ordering four-digit whole numbers. It requires considerable understanding of how the number system works. Playing the game, and discussing it afterwards, can really help to develop a firm concept of place value.
Why have you put a $5$ here?
Where is the best place to put $9$ when you are aiming for the lowest/highest number?
Learners could make up their own criteria for a new game possibly using four five-digit numbers.
Children could use this simpler version of the problem.