Here is a part-whole model. Sometimes the model is rotated. It looks different, but it still has two parts and a whole. We can use this model to help us solve problems. We can put 4 things in one of ...

Build, read, write, and represent four-digit numbers using base-10 blocks and symbols. Build, read, write (in standard and expanded form), and represent four-digit numbers using base-10 blocks and ...