Students learn how to calculate the limits of accuracy of rounded numbers.

As learning progresses they are challenged to consider the upper and lower bounds of simple calculations.

**Differentiated Learning Objectives**

- All students should be able to calculate the limits of accuracy for a number rounded to the nearest power of ten.
- Most students should be able to calculate the limits of accuracy for a number rounded to the nearest decimal place.
- Some students should be able to calculate the limits of accuracy for a number rounded to the nearest significant figure.