To solve , you first need to convert everything to the same unit. There are 1,760 yards in a mile, so 4 miles equals . Adding the 900 yards gives you . Since the original question was to add two identical distances, the total distance is or approximately .

To make everyday measurements easier, it can be helpful to remember some quick conversions. For example, know that 1 mile is roughly 1.6 kilometers. This can be handy when you hear distances related to running or cycling events, as most people are more familiar with metric units. If you ever find yourself lost in conversion, a smartphone app can make this process a breeze.

If you’re dealing with mixed units often, practice can help prevent miscalculations. A common mistake is to forget to convert both parts of the measurement before adding, or to mix up yards and miles when doing the math. Keep a conversion chart handy until you feel 100% confident, and double-check your work, especially in significant physical tasks like planning a hike or a race!