Grocery Money

Grocery Money is a Grade 3 mental-math activity built around a $100 shopping budget. As the class moves through an imaginary grocery store, students estimate costs by rounding prices and quantities, then keep a running total in their heads. The familiar shopping context gives rounding a purpose and helps students see why an estimate can be more useful than an exact calculation when making quick decisions.

Use it as a whole-class number-sense routine or an independent mental-math challenge. Pause after each purchase to compare different reasonable estimates and ask whether the budget is still safe. Create a free Find a Math Game account to generate teacher-ready lesson support for Grocery Money. No credit card is required, and the free account includes 3 lesson generations for life.