Mathematical signs, symbols and abbreviations

+ — ± X : () {} [ ] ~ a=b a b a b a ± b a > b a» b a<b a2>ad x a b p = q a' a" a'" ā a1 a2 an 90° 10//   a + b=c (a + b)2 4+7=11 12>5+5 5+5<12 с— b=a (2x—y)

plus minus plus or minus sign of multiplication, multiplication sign sign of division, division sign round brackets; parentheses curly brackets; braces square brackets; brackets approaches, equivalent, similar is approximately equal   a equals b; a is equal to b   a is not equal to b; ais not b   a approximately equals b   a plus or minus b   a is greater than b   a is substantially greater than b   a is less than b   a second is greater than a d-th   x tends to infinity   a is greater than or equals b   p is identically equal to q   a prime a double prime, a second prime a triple prime   a vector; the mean value of a a) a first b) a sub one c) a suffix one   a) a second b) a sub two c) a suffix two   a) a nth b) a sub n c) a suffix n   ninety degrees   ten seconds, also ten inches   a plus b is c a plus b equals с a plus b is equal to c a plus b makes с   a plus b all squared     four plus seven is eleven four plus seven equals eleven four plus seven is equal to eleven   twelve is greater than five plus five   five plus five is less than twelve   с minus b is a с minus b equals a с minus b is equal to a с minus b leaves a   bracket two x minus у close the bracket

18—6=12 1Х1=1 2X2=4 5Х5 =25	eighteen minus six is equal to twelve eighteen minus six equals twel­ve eighteen minus six is twelve eighteen minus six leaves twelve   once one is one   twice two is four twice two makes four   five times five is twenty five five multiplied by five equals twenty five five by five is equal to twenty five
a =	a is equal to the ratio of e to 1
=ab	ab square (divided) by b equalsab
=0	a) a divided by infinity is infinitely small
	X plus minus square root of x square minus y square all over y
16:4=4	sixteen divided by four isfour sixteen by four equals four sixteen by four is equal tofour the ratio of sixteen to four is four
20: 5=16: 4 =	the ratio of twenty to five equals to the ratio of sixteen to four
1:2	the ratio of one to two
51: 1	the ratio of fifty one to оne
2: 3= 4:6	two to three is as four to six
1/2	a (one) half
1/3	a (one) third
1/4	a (one) quarter, a (one) fourth
2/3	two thirds
3/4	three quarters; three fourth
5/6	five sixths
25/57	twenty five fifty sevenths
2 1/2	two and a half
3 3/4	three and three quarters
1/273	one two hundred and seventy
0.5 .5	o [ou] point five zero point five nought point five point five one half
0.002 .002	о [ou] point о [ou] о [ou] two zero point zero zero two point two oes [ouz]two point two noughts two
0.0000001	o[ou]point six noughts one
1.1	one point one
2.1	two point one two
15.505	Fifteen point five nought five
2.12	Two point one two
x2	a)x square; x squared b) the square of x c) the second power of x d) x raised to the second power e) x to the second power
42=16	a)the second power of fouris sixteen b) four squared is sixteen
у3	а) у cube, у cubed b) the cube of у c) the third power of у d) у raised to the third power e) у to the third power
33 =27	the cube of three is twenty seven
a5	a to the n-th power a raised to the fifth power
an	a to the n-th power a to the n-th power
y-10	у to the minus tenth power
= 4	the square root of sixteen is four
	the square root of a
=3	the cube root of twenty seven is three
	the cube root of a
=2	the fourth root of sixteen istwo
	the fifth root of a square
=	alpha equals the square rootof capital R square plus x square
	the square root of 7 first plus capital A,divided by two xa double prime
	a) dz over dx b) the first derivative of z with respect to x
	a) the second derivative of у with respect to x b) d two у over d x square
m ∫ n	a) the integral from n to m b) integral between limits n and m
tan r	Tangent r
Log 2	The logarithm of two
logcd	Logarithm of d to the base c
	The integral of dy divided by the square root out of c square minus y square