This challenge focuses on having students figure out how an old roll of 15 cent stamps could be combined with some new 33 cent stamps to mail a package. A number of resources are provided that students can use if they get stuck. The Getting Started section helps students get on the right track. But if they get, stuck there are hints and a section giving possible solutions. There are also related questions for them to try out their knowledge, interesting background information, and other resources.
3, 4, 5, 6, 7, 8
Algebra, Arithmetic, Number Sense