Discussion post:
Give at least 3 examples from the past month where you needed to perform basic arithmetic. Make sure one of your examples deals with fractions. Did you need to use a calculator for the calculation, or could you use mental math? What are some tricks you have for performing mental math with basic arithmetic? Here’s one such example: Say you need to determine the 20% tip on a bill of $43.12. You can first find 10% of the bill by moving the decimal place and you get 4.312, or roughly 4.3. Then you double that (because 20% is 2 x 10%) and get 8.6, which means $8.60 is roughly 20% of $43.12.