(This picture has nothing to do with this post…. but it’s cold outside, so I picked a snow picture!)
Math is different around the world. I’m convinced of that. My husband was taught math in Canada and he DOES NOT do multiplication the way I was taught here in the good ol’ US of A. And he’s not converting from metric either; he simple learned a funky, three-step process to do the facts, and I merely memorized them. On occasion, I do use my fingers for the nine’s times tables, but that’s only really late at night. [You know… hold up your ten fingers. Bend down the number you are multiplying by nine. Read the tens and ones with the remaining fingers. I.e. 9×4 Hold up your ten fingers. Bend down the fourth finger from the left. There are three fingers standing on the left (tens = 30) and six fingers still standing on the right (ones = 6) Hence, 36.] But my dear husband’s process has you subtracting and adding numbers up and down from the number you started with. And you’re supposed to remember all these numbers as you go. Too many steps for my little brain.
Today, at the kitchen table while teaching math to the little Colombian princess, I was assuming that Colombians learned addition differently than I did. Here are the equations and her answers:
15. 5 + 4 = 24
16. 3 + 8 = 27
Get it? I didn’t. For a LONG time. Finally I explained that it was a pre-test and I didn’t expect her to know how to do those problems yet. THEN I SAW the DOTS. She draws little dots and counts them. For the first problem, she drew 15 dots, 5 dots and 4 dots. She counted them all and wrote the correct answer! SHE WAS INCLUDING THE NUMBER OF THE PROBLEM! Hahahaha! And she DID know how to add them ALL! So after we got it all ironed out, it was smooth sailing. Colombian math is just like USA math, but probably not like Canadian math! (If I can help it!)