One of the symbols ( or ) provided to represent grouping. Parentheses have a great many specialized meanings in mathematics. A few of this are explained below.

You are watching: What does parentheses around a number mean in math

1. Parentheses are offered in mathematical expression to denote modifications to normal order of work (precedence rules). In one expression like

*
, the component of the expression within the parentheses,
*
, is evaluate first, and also then this result is supplied in the remainder of the expression. Nested parentheses job-related similarly, since parts the expressions in ~ parentheses are additionally considered expressions. Parentheses are likewise used in this manner to clarify bespeak of work in confusing or abnormally big expressions.

2. A parenthesis can be supplied to represent an open end of one interval. For example,

*
denotes the half-closed term which consists of all actual numbers indigenous 0 to 5 except 5 itself.

3. Bracket are offered to enclose the variables of a function in the type

*
, which means that worths of the function
*
space dependent top top the values of
*
.

4. Huge parentheses approximately two numbers, one above the other, denotes a binomial coefficient

*
.

5. Parentheses approximately a collection of two or much more numbers, together in

*
, represent an
*
-tuple the numbers the are connected in some special way.

6. Big parentheses around selection of numbers, e.g.,

*
suggest a matrix. (However, in this work, the symbol
*
" /> is supplied instead.)

7. Clip may likewise be provided to signify the greatest usual divisor, e.g.,

*
.

8. Bracket are provided to signify a congruence, together in

*
.


SEE ALSO: edge Bracket, Brace, Bracket, Complexity, Square Bracket
REFERENCES:

Bringhurst, R. The facets of Typographic Style, 2nd ed. Point Roberts, WA: Hartley and Marks, p.282, 1997.

Grossman, J. (Managing Ed.). "Parentheses." §5.123-5.5.127 in The Chicago manual of Style, 14th ed. Chicago, IL: college of Chicago Press, pp.189-190, 1993.


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