Language structure

Task

Main math expressions

I. Ordinal and relation signs:

1.	firstly, in the first place
2.	secondly, in the second place
.	point, decimal point
...	and so on to
x1	x one, x sub one
x→ ∞	x approaches infinity, x tends to infinity
=	is equal to
≠	is not equal to, does not equal
α , ~	is directly proportional to
≈ ≅	approximately equals to, is approximately equal to
( )	parentheses, round brackets
[ ]	brackets, square brackets
<	is less than
>	is greater than
≤	is not greater than
≥	is not greater than of equals

II. Operation signs and terms:

+	addition + (plus), H2+Cl2=2HC
-	subtraction – (minus), L-1=a
*	multiplication * (multiplied by)
	multiplicand
	multiplier
/	division / (divided by), 6 mol / 3 mol = 2 mol
	divisor / denominator
	difference / remainder
	sum
	product

III. Fractions:

1/2	one second, or a half
1/3	one third, or a third
2/3	two thirds
1/4	one forth, or a fourth, or a quarter
1/100	a hundredth
5/16	five sixteenths
23/6	twenty-three six
9/9	nine ninths
	three and five sevenths
	ar over br equals ar over br
	five sixths divided by a half equals one and two thirds
	to reduce a fraction -to its lowest terms -to its highest terms
	to convert
	ratio

IV. Decimal fractions:

.2	point two
0.2	0 point two, or two tenths
0.02	0 point two, or two tenths
12.707	twelve point seven 0 seven
0	0, or, zero, or naught, or cipher, or nil (null)

V. Roots:

	root; a fractional exponent
	to extract a root e.g. (the) n-th root of c is equal to b
n	index of a root
c	radicand
b	value of a root
	square root of (x)
	cube root of (x)

VI. Powers:

	b to the n-th power is equal to c b to the n-this equal to c the n-th power of b is equal to c b to the power of n is equal to c b to the power n is equal to c
	b squared; b cubed
	b to the power of minusn
b	base
n	power exponent
c	value of a power
	power
	the m over n-th power of a equals the square root of a to the m-th power

VII. Logarithms:

log	logarithm
	the logarithm of c to the base b is equal to n natural logarithm of a number(ln c)
	logarithm expression(common) logarithm of a number (log c; or lg c)
B	base
C	antilogarithm
N	value of a logarithm

VIII. Other expressions:

α	a prime
α	a double prime

Practice Exercises