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This challenge is about finding the difference between numbers which have the same tens digit.
Here are two examples where I've decided to use numbers which have two tens:
The number above is always the difference between the two beneath it.
Can you find different pairs of numbers with a difference of 1 or 2 or 3 or 4 ... and so on?
Can you find more than one way of doing it?
Find a great variety of ways of asking questions which make 8.
Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?
Noah saw 12 legs walk by into the Ark. How many creatures did he see?