Rounding means making a number simpler but keeping its value close to what it was.

The result is less accurate, but easier to use.

There are many ways to round. This is the most common method:

• Decide which is the last digit to keep.

• Leave it the same if the next digit is less than 5 (this is called rounding down)

• Increase it by 1 if the next digit is 5 or more (this is called rounding up) 

Exercises: