ROUNDING
5 and above
give it a shove
4 and below
leave it alone
LONG DIVISION
Dirty Monkeys Smell Bad
Divide, Multiply, Subtract, Bring down
MATH FAcTS
http://www.sheppardsoftware.com/math.htm
Dees ditties
http://www.twogetherexpress.com/Dees'%20Ditties.htm