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Multiplication and Other Operations Vocab.

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Word
Definition
Example
Repeated Addition Property of Multiplication   If n is a positive interger, then nx= x+x+x+.......+x. n addends.   x+x+x+x+x+=5x  
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Like terms   These numbers can be simplified into a single number.   12y+y+2y=15y  
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Unlike terms   These numbers cannot be simplified by a single number.   12x + 6y  
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Multiplication Property of Equality   If x=y, then ax=ay.   x=y, x=5, a=2, ay=ax  
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Equation of the form ax+b=c   In this equation, the unknown w is multiplied by a number. Then a second number is added.   3w+5=20  
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Distributive Property of Multiplication over Addition   For any numbers a, b, and x, ax+bx+=(a+b)x and x(a+b)= xa+xb.   7*9+12*9= 9*(7+12)  
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Distributive Property of Multiplication over Subtraction   For any numbers a, b, and x, ax-bx= (a-b)x and x(a-b)= xa-xb.   7*3.98= 7(4-.02)  
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Net   A plane pattern for a 3-dimensional figure.   n/a  
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Surface Area   The surface area of a rectangular solid is the sum of the areas of its faces.   n/a  
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Numerically equal   When the area and perimeter of a figure are equal.   If the area of a rectangular solid is 6cm*3cm=18cm, and the perimeter is 6cm+3cm+6cm+3cm=18cm  
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Acre   A unit of measure that is used to measure land area.   Farms are measured in acres, 640 acres=1 square mile  
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Height   The perpendicular distance from any vertex of a triangle to the side opposite that vertex. Also the distance between the bases of the trapezoid.   n/a  
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Altitude   The perpendicular segment from a vertex of a triangle to the opposite side of the triangle. Same as height for the trapezoid.   n/a  
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Base of a triange   The side of a triangle perpendicular to the altitude.   n/a  
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Area Formula for Any Triangle   Let b be the length of a side of a triangle with area A. Let h be the length of a altidute drawn to that side. Then A=1/2 bh.   If base is 20, and height is 15, then A=1/2 20*15=150 square units  
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Trapezoid   A quadrilateral with at least one pair of parallel sides.   n/a  
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Area Formula for a Trapezoid   Let A be the area of a trapezoid with bases b1 and b2 and height h. Then A=1/2 *h(b1+ b2).   (blank)  
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Base of a trapezoid   The parallel sides of a trapezoid.   n/a  
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Created by: Aamir
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