Math Coachs Corner: Comparing Numbers. The ones, tens, hundreds structure and the relationship between digits in each place sets the stage for all work that students will do with larger numbers and decimals. So how do we build that deep understanding? First and foremost--LOTS of concrete learning. Move from showing tens and ones using groupable objects (like linking cubes) to building numbers with base-10 blocks. And then never put the base-10 blocks away! All...year...long.