Present, Past, Future Simple (Active), страница 6

one                two            three

seventh          sevenths     fifths

В смешанных числах употребляется союз «and».

3 1/3 — three and a third, 2 1/2 — two and a half.

Сочетания дробных числительных с существительными образуются следующим образом:

1/2 km half a kilometre (a half kilometre), 1 1/3 tons — one and a third tons (one ton and a third) 2 1/3 pounds (lb) two and a third pounds (two pounds and a third).

В десятичных дробях (decimal fractions) каждая цифра обозначается отдельным количественным числительным.

0.3 — nought point three (или .3 — point three) 2.25 two point two five; 16.205 one six (sixteen) point two nought five.

Ноль читается любым из трех способов: zero ['ziarou], nought [no:t], о [ou].

Addition Сложение

3 + 7=10

Three plus seven equals ten. Three plus seven is equal to ten.

a+b—c

a plus b equals с

plus [plAs] — плюс; positive sign [sain] — знак плюс;; sign of addition — знак сложения; addend [a'dend] слагаемое; item [aitam] — слагаемое; sum — сумма, суммировать; summond ['sAmand] — слагаемое; total [toutl]— целое, сумма; итог, подводить итог; unknown — неизвестное; equality — равенство; symbol — условное обозначение; sign [sain] знак, ставить знак.

Subtraction Вычитание

11—3 = 8

Eleven minus three equals eight. Three from eleven leaves eight.

ab = c

a minus b is equal to с

minus ['mainss] минус, без, отрицательный знак; negative sign — минус, отрицательный знак; minuend ['minjuand] — уменьшаемое; subtrahend ['sAbtrshand]; difference ['difrons] — разность; between — между.

Multiplication Умножение

2X2=4

Twice two is four; 3X3=9

Three times three is nine. 5x5=25

Five times five is twenty-five.

Читается  times   при   умножении  небольших  целых чисел.  В остальных случаях —multiplied by  (или by). 12X12=144

Twelve (multiplied) by twelve equals one hundred ;and forty four.

a-b—c

a multiplied by b equals с

X—multiplication sign — знак умножения; multiply f'nultiplai] — множить, умножать; multiplicand [,тл1-'tipli'kaend] — множимое; multiplier [дплШ'рЫэ] — множитель; factor ['faekta] — множитель, коэффициент, фактор; product ['prodakt] — произведение.

Division Деление

■25:5=5

Twenty five divided by five equals five

a: b — c

a divided by b is equal to с

a+b    c+d

abсd

a plus b over a minus b is equal to сplus d over сminus d

Involution

Возведениевстепень

32 Three squared (three square). Three (raised) to the second power.

53 Five cubed (five cube). Five (raised) to the third f)ower.

8=23 Eight is the third power of two.

105 — Then to the fifth power.

10-7 — Ten to the minus seventh power.

n~10 — я to the minus tenth power; n to the minus tenth.

power — степень; raise to a power — возвышать в степень;   exponent  [eks'pounant] — показатель.

Evolution Извлечениекорня

У4=2 The square root (out) of four is (equals) two.

у27=3   The cube root of twenty seven is three.

■j/16=2   The fourth root of sixteen is two.

Уa   The square root of a

yfa2   The fifth root of a square

extract [iks'traekt] извлекать; extract the root of (out of) —извлекать корень из ..; radical sign — знак корня..

Ratio Отношение

1 :2

The ratio of one to two;

4:2=2

The ratio of four to two is two.

on    с      ie    a   20        16

20: 5= 16: 4 или     - =------

5                                    4

The ratio of twenty to five equals (is equal to) the ratio of sixteen to four (twenty is to five as sixteen is to four).

a : b = c

The ratio of a to b is с

: ratio sign — знак отношения, читается как to или is to.

Proportion Пропорция

2:3=4:6

Two is to three as four is to six. The ratio of two to three equals the ratio of four to six. a : b=c : d a is to b as сis to d x/y x varies directly as y\ x is directly proportional to y.

Equation Уравнение

{a+b){a—b)=a2—b2

The product of the sum and difference of two quantities is equal to the difference of their squares.

identity [ai'dentiti] тождество; value ['vaelju] величи-ма, значение.