The purpose of this task is for students to relate addition and subtraction problems to money and to situations and goals related to saving money. This problem can be adjusted based on where students are in their understanding of addition involving two digit numbers. To see a task with the same context that shows the mathematical work that second grade students will be doing around multi-digit addition, see 2.OA, NBT Saving Money 2[MB1] .
Tasks for 2.MD.C
The purpose of this task is to address the concept of opportunity cost through a real world context involving money. The task requires students to solve word problems involving quarters, dimes, nickels, and pennies using addition and subtraction.
The purpose of this task is for students to compare two options for a prize where the value of one is given $2 at a time, giving them an opportunity to “work with equal groups of objects to gain foundations for multiplication.” This context also provides students with an introduction to the concept of delayed gratification, or resisting an immediate reward and waiting for a later reward, while working with money.