With rounding, you often get asked to find two values. These are the Upper Bound (UB) and the Lower Bound (LB) and when these 2 values are written in the form of an inequality, we refer to them as ERROR INTERVALS.

These two values can easily be worked out using a simple 3-step approach.

Example 1 (accuracy = 1m)

Example 2 (accuracy = 10cm)

Example 3 (accuracy = 2 decimal places)

Example 4 (accuracy = 2 significant figures)

Example 5 (complex example)

Points to consider before solving this problem…

Now we can work out the Maximum Speed

Rounding to - the nearest... / a significant figure
Outcomes / Sample Spaces