Language structure
- Task
- Practice Exercises
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Main math expressions#
I. Ordinal and relation signs:1. | firstly, in the first place |
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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 |
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II. Operation signs and terms:+ | addition + (plus), H2+Cl2=2HC |
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- | 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 |
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III. Fractions:1/2 | one second, or a half |
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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 |
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IV. Decimal fractions:.2 | point two |
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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) |
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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) |
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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 |
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VII. Logarithms:log | logarithm |
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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 |
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VIII. Other expressions:α | a prime |
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α | a double prime |