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Go to the Math Links page to find some interactive and interesting Math Dictionary pages.
The following are math vocabulary words we are using daily.
- area: measurement of inside of a shape; we count the square units to make up the shape, or can mulitiple the dimensions
- bar graph: graph using bars to show data
- congruent: shapes with the exact same size and shape
- denominator: the bottom number in a fraction; it tells how many parts to equal one whole
- digit: numerals 0 1, 2, 3, 4, 5, 6, 7, 8, or 9
- difference: answer when we subtract
- estimate: to find a number that is close to the exact number, usually uses rounding; educated guess
- expanded form: write a number showing its place value (ex. 20 + 3)
- factor: a number that is multiplied; numbers that you can count by to land on a multiple
- foot: unit of measurement, 12 inches
- hour: unit of measurement of time; 60 minutes
- improper fraction: when the numerator is larger than the denominator (you have more than one whole)
- intersecting lines: lines that cross; can be perpendicular but don't have to be
- line plot: a sketch showing the values of data along a horizontal axis and X's the frequency of those values (working graph)
- minute: unit of measurement of time; 60 seconds
- mixed fraction: when you have a whole number and a fraction ex. 2 1/2
- multiple: the number we land on when county by another number (20 is a multiple of 2, 4, 5, 10)
- numerator: the top number in a fraction; it tells how many parts you have
- ordinal numbers: numbers used for ordering (ex. 1st, 2nd, 3rd, 100th, etc)
- parallel lines: lines that are same distance apart at all times, they will never cross or intersect
- perimeter: measurement around a shape; we use hash marks to count the units around or add up the demensions of all sides.
- perpendicular lines: lines that cross or intersect to make right angles or 90 degree angles
- pictograph: graph using symbols or pictures to show data (symbol may = more than 1; therefore a key)
- product: the answer when you multiply
- quotient: the answer when you divide
- right angle: angle that is exactly 90 degrees; we use a square to measure it
- rounding: replacing a number with it's nearest tens, hundreds, thousands (23 rounds to 20, 26 rounds to 30, 25 rounds to 30 [5 or higher rounds up, less than 5 rounds down])
- standard form: the traditional way to write numbers using numerals (ex. 23)
- sum: the answer when you add
- symmetry: creating mirror images that are exactly alike
- word form or name: write a number using words (ex. twenty-three)
- yard: unit of measurement equalling 3 feet or 36 inches
- <: a symbol meaning Less than; we think of L turned on it's side makes this symbol and stands for Less than
- >: a symbol meaning Greater than
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