median
don steward
mathematics teaching 10 ~ 16
Tuesday, 8 February 2011
1089
this is well known task
choose any 3 digit number
reverse the digits and subtract (if it is 630 the reverse would be 036)
reverse these new digits and add
to prove the result, students will probably need some help...
No comments:
Post a Comment
Newer Post
Older Post
Home
Subscribe to:
Post Comments (Atom)

## No comments:

Post a Comment