2.1.1 Apply rounding rules on a given set of examples

      Rounding up from 5 rule
      • Put simply, if the last digit is less than 5, round the previous digit down. However, if it's 5 or more than you should round the previous digit up.
        • A note on decimal places: Rounding depends on the size of the number
          • With 3 decimal places, .00257 becomes .003 (that's a 17% difference!)
        • Significant digits: 3 or 4 is usually adequate ( brush up on significant digits if you are unsure about these)
        • 36,253.25 ft³ becomes 36,300 ft³ ( only a 0.13% difference)