![]() |
kllindsey![]() |
| ||
We used this in Algebra I, part 2 as a break in studying for a test. The kids thought it was fun. www.digicc.com/fido/ | |||
scombs![]() |
| ||
Math Posts: 104 ![]() Location: Henry Clay | I have used this as an extra credit problem for students who can figure out and explain why this works. It is based on the "Casting Out Nines" principle. | ||