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About
Our Team
YM Research
Contact Us
Math Topics
Data Collection and Analysis
Measurement
Number: Counting and Cardinality
Number: Adding and Subtracting
Patterns and Structure
Shapes and Geometry
Sorting and Attributes
Spatial Relations
Math Games
Explore Math Games
Dot Card Games
Games with Cards and Dice
Games with Fingers and Counters
Movement Games
Pattern and Sorting Games
Shape Card Games
Shape Games and Puzzles
Learn More
Resource Library
Math Mindset
Resources for Math at Home
Math Minibooks
Math Picture Books
Videos
Articles
Publications
Get Game Kits
How Many Are Hiding? (Counters) (Portuguese)
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How Many Are Hiding? (Counters) (Portuguese)
How Many Are Hiding? (Counters) (Portuguese)
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