decimal: A number that uses place value and a decimal point to show values less than one, such as tenths and hundredths Example: 3.47
decimal number system: A place value number system based on grouping by tens: each place has a value 10 times the value of the place at its right
decimal point: A periodused in decimal numbers to separate the whole number part from the decimal part Example: 0 . 3 three-tenths, A zero is used to show there are no ones.
denomiator: The number below the bar in a fraction. It tells the total number of equal parts or groups into which the whole or group has been divided. Example: 3/4 the 4 is on the bottom and therefore is the denominator
equivalent decimals: Decimals that name the same number or amount Example: 0.5 = 0.50 = 0.500
equivalent fractions: Two or more fractions that name the same amount. Example: 3/4 and 6/8 name the same amount.
hundredth: One of one hundred equal parts Example: 1/100 or 0.01 both represent hundredth
irrational number: A number that cannot be expressed as a repeating or terminating decimal Example: pi and the square root of 5
mixed number: A number that is made up of a whole number and a fraction. Example: 3 3/4 the number 3 is the whole number and 3/4 is the fraction
natural numbers: The set of numbers {1,2,3,....} used for counting separate objects
numerator: The top part or top number of a fraction is the numerator
percent: A part of some number to 100; the symbol for percent is %. Example: 40/100 = 40%
rational number: Any number that can be expressed as a ratio in the form of a/b where a and b are integers and b does not equal zero
repeating decimal:A decimal in which one or more digits repeat endlessly
terminating decimal: A decimal that ends; a decimal for which the division operation results in a remainder of zero
unlike fractions: Fractions that have different
denominators. Example: 3/4 and 2/3 Three-fourths and two-thirds are unlike
fractions.
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