An

An

1 b x h where: b = base --- x b x h or ------- h = height 2 2Usually,

bh so, if b = 5 and h = 4 then bh = 5 x 4 = 20

bh ---- = bh/2 2

So... if you have 2 variables "a" and "b", then...

If a = 3 and b = 5, here are some expressions:

- a + b = 3 + 5 = 8

- a + 2b = 3 + 2x5 = 3 + 10 = 13 <= do the multiply first!

- a - b = 3 - 5 = - 2 <= Remember your negative numbers!

- ab = 3 x 5 = 15

5a 5x3 15 ---- = ----- = ---- = 3 b 5 5