mathematics teaching 10 ~ 16
Tuesday, 25 May 2010
how many 2-digit numbers are reversed when you:
(a) add 1 and then divide by 2?
(b) subtract 2 and then divide by 2?
(c) subtract 10 and then divide by 2?
(d) divide by 2 and then multiply by 9?
Post a comment
Post Comments (Atom)