Lesson objective: Apply rounding to approximate a total.

This lesson provides an opportunity for students to apply their knowledge and understanding of rounding to a real-life situation. Students are asked to round three numbers and add the results to get a total approximation of visitors at an amusement park.

Key Concept students will use:

- Rounding to approximate multiple values

Skills students will use:

- Rounding numbers to the thousands
- Adding whole numbers

Students engage in Mathematical Practice 8 (look for and express regularity in repeated reasoning) as they use the structure of the base-ten system to generalize their strategies to round a six digit number to different places.

**Key vocabulary: **

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