SOLUTION: How do you solve this problem using at least two methods other than the traditional algorithm. (520) (69) Can anyone help?

Algebra ->  Divisibility and Prime Numbers  -> Lessons -> SOLUTION: How do you solve this problem using at least two methods other than the traditional algorithm. (520) (69) Can anyone help?      Log On


   

Question 401577: How do you solve this problem using at least two methods other than the traditional algorithm.
(520) (69)
Can anyone help?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
You could do 520*70 - 520, since this is equal to 520(70-1) = 520(69). Or you could do 500(69) + 20(69).