A fun, easy and quick way to practice problem solving or mental math is to use puzzles, I created a page where I keep adding puzzles - here are a couple samples:
Click on the puzzle to take you to the other puzzles.
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I came across another couple of amazing web sites for ideas to build number sense. So I am calling them Number Talks as well - the best use ... -
The Estimation Clipboard is from Steve Wyborney, the same one who created the SPLAT series and the Interactive Hundred Chart. This is a gr...
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