Tag: associative property

Will our U.S. flag change yet again?

How many stripes are in our present flag pictured above?  (The bottom right flag that has been in use since 1960.) How many stars? What do the numbers of stars and stripes represent? U.S. Congress is again considering whether to…

Lots of pieces

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 all of these puzzles?  Can you…