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Math Terms By: Jori Gellington Integers Negative & Positive #s The addition rules for integers is if the signs are the same don’t change the sign The subtraction rules are same change change Percent To find of percent a number you multiply the original number times the decimal for that percent. Scale Factor Scale Factor is the number you multiply, by in order to move a shape larger or smaller. Dilations Is when an original shape is enlarged or made smaller by multiplying each side or point by a scale factor. Perimeter When you change the dimensions you multiply the original perimeter times the scale factor. Area When dimensions are changed proportionally you multiply the original area times the scale factor squared. Theoretical Probability Is what should happen in a given event. Experimental Probability Is what actually occurs during the event. Independent Event Is an event where the outcome of one event does not affect the outcome of another. Dependent Event Is an event where the outcome of the first event affects the outcome of the second event. Negative Exponent Move the decimal to negative side of # line. Positive Exponent Move decimal to positive end of the # line. Division Fraction 1st number stays the same change to multiplication change 2nd number to its invert. Recipripical Means the opposite.