Resumen de Solutions: Packing candies

Ed Enns (ed. lit.)

• Do your students understand unitizing and the role it plays in our place-value number system? One of the important mathematical ideas that students need to learn is unitizing, or knowing that individual items can be organized or "packed" into groups and that those groups can then be counted as individual items. Despite having numerous experiences with base-ten blocks and place-value mats, many students may experience difficulty describing the quantity of numbers flexibly within our place-value system. The Packing Candies problem provides students with an authentic purpose to unitize: to organize a collection of loose candies into bags containing 10 candies and boxes containing 10 bags, or 100 candies.