ARITHMETIC GLOSSARY
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Title  Description  

Decimal  Digits to the left of the decimal point represent Integer Values. Digits to the right of the decimal point represent Decimal Fractions. All place values whether to the left or the right of the decimal point are successive powers of 10. The term decimal comes from the latin decimus which means tenth. In common language, base 10 numbers with digits to the right of the decimal point are considered decimal values. 

Decimal Fraction  Most simply, decimal fractions are the digits to the right of the decimal point.  
Decreasing  Decreasing means to lessen in extent or scope, to be reduced. A function is considered to be Decreasing if the values in the range decrease as the values from the domain increase. 

Denominator  The Denominator of a fraction is the number on the bottom; it is the divisor of the numerator.  
Dependent Variable  If y = f(x), then y is a function of x and y is the Dependent Variable. Think of it this way: whatever we get for output "y" depends on the input "x" we grab from the domain of the function. 

Difference  The result of subtraction is often considered a Difference.  
Digit  Each of the numerals 0 through 9 is a Digit. The term also refers to place value, as the "tens digit" or the "hundredths digit." 

Direct Variation  Also direct proportion, when variables are in Direct Variation to one another they have the relation that as one variable grows the other either increases or decreases by a constant multiplication factor. When y = kx, we say the variables are in Direct Variation. 

Distance  A length from one point to another is considered a Distance. Any measurement in one dimension confers a length, which is Distance. 

Distributive Property  Given a sum to be multiplied by an outside factor, we may distribute the multiplicative factor over the addends of the sum. The result is that each addend of the sum is multiplied by the outside factor; we then sum the individual products. Example: 3 x (4z + 5) = 12Z + 15. More simply: 5 x (7 + 2) = 5 x 7 + 5 x 2, also written 35 + 10, which is 45. Of course, the original 5 x (9) is 45. So, relax. It's so, so easy. 

Dividend  When we divide, we typically "begin" with a dividend. We divide the dividend by the divisor and we get the resulting quotient. In a fraction, which is always topdividedbybottom (numerator divided by denominator), the top of the fraction is the dividend, the bottom is the divisor, and the value of the resulting fraction is the quotient. 

Division  The process of finding a quotient or a ratio. One of the four basic operations of arithmetic, division begins with a dividend that is to be divided by, or segmented into parts, by a divisor. The result of dividing the dividend by the divisor is called the quotient. 

Divisor  The number we "take into" the dividend when we divide is termed the Divisor. In fractions, which are always topdividedbybottom (numerator divided by denominator) we divide the top (the dividend) by the bottom (the divisor) and the value of the resulting fraction is the quotient. 

Double  Twice the value of a real number is Double the value. To Double is to multiply by two, so to Double a half results in a whole. 
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