Rekenrek by mathies!

The Rekenrek tool helps to build a deeper understanding of number concepts and relationships. Mathematical Concepts:Make visual models that help explore mathematical thinking related to:understanding number relationships using anchors of 5 and 10representing numbers in different ways, composing and decomposing numberssubitizing (instantly seeing how many)counting principlesunderstanding addition and subtractiondeveloping multiplicative thinkingvisualizing division facts Features:Adjust the number of rows. Communicate your thinking or highlight various features of your representation using the pencil button.