Math Tools

e.g. 1/2 + 1/3 = 5/6

e.g. 20% of 80 = 16

e.g. 12 : 18 = 2 : 3

e.g. GCF(12, 18) = 6, LCM = 36

e.g. 60 = 2² × 3 × 5

e.g. 1000 at 5% for 3 years → 1150

e.g. 12 ÷ 4 + 7 = 10

e.g. 5 km = 3.1069 mi

e.g. 3x + 4 = 19 → x = 5

e.g. x² − 5x + 6 = 0 → x = 2, 3

e.g. 6 × 4 → P = 20, A = 24

e.g. legs 3, 4 → 5

e.g. cylinder r 3, h 5 → V ≈ 141.4

e.g. θ 30°, opposite 3 → hypotenuse 6

e.g. 2, 4, 4, 6, 9 → population σ ≈ 2.366

e.g. 5C2 = 10, P(red) = 25%

e.g. y = x² − 4

e.g. 2, 5, 5, 8 → median 5, IQR 3