# subtraction

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## subtraction,

fundamental operation of arithmetic; the inverse of addition. If a and b are real numbers (see numbernumber,
entity describing the magnitude or position of a mathematical object or extensions of these concepts. The Natural Numbers

Cardinal numbers describe the size of a collection of objects; two such collections have the same (cardinal) number of objects if their
), then the number ab is that number (called the difference) which when added to b (the subtractor) equals a (the subtrahend). In terms of addition the symbol −b is called the additive inverse of b with the property that the sum of a number and its inverse equals 0, or b+(−b)=0. It follows that −(−b)=b. The subtraction of b from a is the same as the addition of a and the inverse of b, or ab=a+(−b); e.g., when a=10 and b=5, then 10−5=10+(−5).

## subtraction

[səb′trak·shən]
(mathematics)
The addition of one quantity with the negative of another; in a system with an additive operation this is formally the sum of one element with the additive inverse of another.
References in periodicals archive ?
An extract from the academic paper 'The Effects of the Meditation Program on the Brain Function of University Students' published in the Journal of the Completion Education Society stated this: 'After the mind subtraction meditation, the university students' brainwaves became stable and their brain quotient enhanced.
Figure 5 shows the result of the spectral subtraction of the spectrum of formamide coated on the ATR rod in a toluene environment saturated with [C.
Global digital subtraction angiography market is estimated to show a healthy growth in the coming years due to increasing incidence of cardiovascular diseases.
compared the subtraction solution times of both skill groups according to the strategies used and found that LS individuals were slower than their HS peers in both retrieval and procedural trials, although no measures of significance were reported.
One of the most common errors students make with number operations relate to the subtraction of one number from the other where one of the digits in the subtrahend is larger than the corresponding digit in the minuend (see Young & Shea, 1981).
The first and simplest LNS architecture for addition and subtraction was introduced in 1975 [8], which was a direct implementation of (3) and (4) using lookup tables (LUT) covering all possible values of F(r = j - i).
Participants were eight second through eighth grade elementary school students, who presented difficulties in the pre-test of addition and subtraction word problems, with the unknown in b and c position.
Consistent with previous studies, the researchers found that the basic number-matching task activated the right parietal cortex, while the addition and subtraction tasks produced additional activity in the left parietal cortex.
A very important application of image subtraction in the field of medical imaging is in Mask Mode Radiography [1], where image subtraction is used to visualize--in real time--the propagation of a dye through the blood stream.
This book/CD-ROM package provides teaching plans, visualization techniques, and activities for teaching numeracy skills to students aged 9-16 who have not gained an understanding of addition, subtraction, multiplication, and division.
This is a report of a teaching exploration at an Indigenous Community School in the Kimberley region of Western Australia that sought to use a specific way of thinking about particular content domain, subtraction, to develop focused mathematically rich learning experiences.
1 : a science that deals with the addition, subtraction, multiplication, and division of numbers

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