Material Detail

An interactive calculator for exploring unit rates through grocery package comparisons. Learners can find the unit price of one package or compare up to five options by mass, volume or item count. It converts compatible units, handles multipacks and displays unit prices alongside total purchase costs.

Instructors can ask learners to calculate each rate by hand, predict which option has the lower unit price, and then check their answers. For example, three packs of eight identical items for $9.60 contain 24 items at $0.40 each. A pack of 20 for $9.00 costs $0.45 each, but requires $0.60 less at checkout.

The page includes worked examples and an explanation of the calculation method. It can support activities on ratios, unit conversion, percentage differences and consumer numeracy. Comparisons should use similar products and compatible measurement types.

The calculator is free to use without an account and requires a web browser with JavaScript enabled. The calculator and this description were prepared with AI assistance.

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