tags: commutative property

tags: commutative property
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Gauss and our star of stars

Number Sense Geometry Math and Art
How many stars are in this image and how did you count them? For Adventurer members we have a teaching suggestions and our solution sheet.

Lots of pieces

Number Sense Math and Social Studies Data and probability
Brian has a lot of puzzles.  His family must love working on them. What do you wonder about his puzzles? What do you notice? Make an educated guess, about how many pieces are in a...
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