User contributions
- 19:28, 13 December 2013 (diff | hist) . . (-290) . . User:Mastermind77 (current)
- 19:25, 13 December 2013 (diff | hist) . . (+2,350) . . N User:Mastermind77 (Created page with "remember these things Average formula: Let a1,a2,a3,......,an be a set of numbers, average = (a1 + a2 + a3,+......+ an)/n Fractions formulas: adding-fractions-formula-image ...")