*Stares at this "subtract by adding" example*
Too tricky when one was trained to just do the "borrow" technique:
![]()
Edit:
Russian Peasant multiplication might be handy, though, how's it work when you're multiplying two odd numbers?
Teachers should be encouraged to learn multiple techniques (as well as their potential pros and cons) and expose them all to their students.
We use essential cookies to make this site work, and optional cookies to enhance your experience.