Lesson objective: Round whole numbers to multiple places.

This lesson helps to build fluency with rounding. A number line is used because it offers a visual and establishes benchmark numbers and midpoint within a range of numbers based on place value. This work develops students' understanding that the same number can be round to multiple places.

Students engage in Mathematical Practice 8 (look for and express regularity in repeated reasoning) as they use the structure of the base 10 system to generalize their strategies to round a six digit number to different place values.

**Key vocabulary:**

- place
- place value
- round
- tie

**Special materials needed:**