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D -
The Roman numeral 500. CD is 400 or 100 less than 500.
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D = r / t -
Distance = Rate divided by time. The formula to determine distance traveled when rate and time are known.
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Denominator -
The bottom number of a fraction (the top number is the Numerator). The Denominator is the total number of parts.
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Degree -
The unit of an angle, angles are measured in degrees shown by the degree symbol:
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Diameter -
A chord that passes through the center of a circle. Also the length of a line that cuts the shape in half.
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Difference -
A difference is the result when one number is subtracted from another.
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Digit -
Digit is another word for a numeral or indiviual number: 1948 is a 4 digit number.
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Dividend -
The number that is being divided (the number inside the division bracket).
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Divisor -
The number that is doing the dividing (the number outside of the division bracket).
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