Re:What use is mental math in 2022?
by christiangenco on Monday February 28, 2022 @01:56PM
(#30503529)
This mistake is so interesting to me. Here's a great explanation of what's probably happening: https://youtu.be/6egeUxIEQnM
tl;dr: mentally we take off "millions" as a unit, do the calculation, then add "millions" back on. This works for addition, subtraction, and inequality but fails for multiplication and division.
tl;dr: mentally we take off "millions" as a unit, do the calculation, then add "millions" back on. This works for addition, subtraction, and inequality but fails for multiplication and division.