Algebra+One

Before Algebra I - Prerequisites

Math Fun!

1. Quick Multiplication: 15*15, 25*25, 35*35, 45*45, 55*55, 65*65, 75*75, 85*85, 95*95 11*19, 12*18,13*17, 14*16, 2 Example: 1*2 = 2, 5*5 = 25, 15 * 15 = 225

Add: 1 + 2 + 3 + .... + n = (using triangle to explain) = ( n * n + n) / 2 or n(n+1)/2 or (1+n)*n/2