NARRATOR:'Ready, steady, Number Squad. Bring on the numbers. Here's Rodd.' RODD:Hey, Number Squad! Thank you, you guys are so cool. Hey! It's good to see you. Check it out. I'm packing for a mountain ...

What is a part-whole model? A part-whole model can be used to show the parts that make up a whole number. You can use them to show relationship between the whole and the parts that make up the whole.