How do the numbers appear on a hundred square?
You could start by finding the piece with the lowest number on it.
Where should that go?
How about the piece with the highest number, which square should
that go over?
You might need to count both forwards and backwards to help you
complete the square!
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?