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# 5th grade math

### academic vocab

TermDefinition
Common Denominator the same denominator used in two or more fractions
Denominator the bottom number in a fraction. Tells the number of pieces making up the whole
Equivalent having the same value
Fraction part of a whole
Greatest Common Factor (GCF) the largest number that divides evenly into two or more numbers
Least Common Multiple (LCM) the smallest whole number greater than 0 that is a common multiple of two or more numbers
Multiple skip counting
Numerator the top number in a fraction
Simplify to reduce a fraction to lowest terms
Whole number all counting numbers including 0
Factor a number multiplied by another number
Quotient the answer to a division problem
Product the answer to a multiplication problem
Difference answer to a subtraction problem
Sum answer to an addition problem
Compatible Numbers numbers that are easy to calculate in your head
Standard Form the common way to write a number
Expanded Form the way to write a number showing the place value of each digit
Word Form the written form of a number without using digits
Estimate an approximate number; not the exact value
Dividend the number to be divided (goes inside)
Divisor the number used to divide another number (goes outside)
Remainder a number left over after division is complete
Factor Tree a diagram that shows the prime factorization of a composite number
Improper fraction a fraction whose numerator is greater than the denominator
Mixed Number a number that has a whole number part and a fractional part
Prime Number a whole number greater than 1 with ONLY two factors, 1 and itself
Composite Number a whole number greater than 1 that has more than 2 factors
Unit fraction a fraction where the numerator is 1 and the denominator is a positive number
Convert to change from one form to another
Area the number of square units needed to cover a space; L x W
Perimeter the distance around the outside of a figure; add up all the sides
Base Area the area of one of the bases of a 3D figure; "B"
Cubic Unit a measure of volume. It is equal to the volume of a cube, which is 1 unit tall, 1 unit wide, and 1 unit long
Height the distance from top to bottom
Volume amount of space an object takes up; L x W x H
Triangle a three sided polygon
Right triangle a triangle with a right angle
Isosceles triangle a triangle with two equal sides
Scalene triangle a triangle with no equal sides
Equilateral triangle a triangle where all of the sides and angles are the same length
Quadrilateral a four sided polygon
Parallelogram a quadrilateral with opposite sides parallel
Rectangle a quadrilateral with straight sides where all interior angles are right angles
Square a quadrilateral, all sides have equal length, and every angle is a right angle
Rhombus a quadrilateral, all sides have equal length, opposite sides are parallel, and opposite angles are equal
Trapezoid a quadrilateral with at least one pair of parallel sides
Pentagon a 5 sided polygon
Hexagon a 6 sided polygon
Heptagon a 7 sided polygon
Octagon an 8 sided polygon
Nonagon a 9 sided polygon
Decagon a 10 sided polyhon
Dodecagon an 12 sided polygon
Polygon a closed figure with at least 3 straight sides and angles
Parallel lines lines that never get closer together, and never intersect
Perpendicular lines lines that intersect at a 90 degree angle
Created by: emcmullen