a+b a plus b a-b a minus b a·b a times b or a multiplied by b or the product of a and b a / b a over b or a divided by b or the ratio of a to b The area of a circle is pi multiplied by the radius of the circle squared PV=nRT The product of pressure and volume equals the product of the number of moles, the gas constant and temperature. VIDEO EXERCISES http://www.math.com/school/subject2/practice/S2U1L3/S2U1L3Pract.html http://learner4life.com/yahoo_site_admin/assets/docs/Math_Tutoring_-_3_Steps_to_Master_Reading_Math_Formulas.19771559.pdf