英语四则运算

1 by 21 divided by 21 plus 21 reduces 2

four arithmetic operation; four fundamental rules我晕加plus减minus乘multiply除divide

1 by 2 1 divided by 2 1 plus 2 1 reduces 21×2用英语怎么说？ one times two;one multiplied by two 1÷2用英语怎么说？ two divided by one 1+2用英语怎么说？ one plus two 1-2用英语怎么说？ one minus two 例如： 2 plus 1 equals 3 二加一等于三 4 minus 2 equals 2 四减二等于二 4 multiplied by 5, 4 times 5 四乘以五1×2用英语怎么说？ one times two;one multiplied by two 1÷2用英语怎么说？ one divided by two 1+2用英语怎么说？ one plus two 1-2用英语怎么说？ one minus two1*2 one times two 1/2 one divided two 1+2 one plus two 1-2 one minus two

加法1+2=3 One and two are three.2+3=5 Two plus three eguals five.4+0=4 Four and nought is equal to four.6+45+34=85 6,45 and 34 added together make 85.减法9-4=5 Nine minus four eguals five.15-7=8 Seven from fifteen leaves eight.乘法1×0=0 One multiplied by nought equals ought.1×1=1 Once one is one.2×1=2 Twice one is two.3×5=15 Three times five is fifteen.除法9÷3=3 Nine divided by three makes three.20÷5=4 Five into twenty goes four times.

1.Logic ∃ there exist ∀ for all p⇒q p implies q / if p,then q p⇔q p if and only if q /p is equivalent to q / p and q are equivalent 2.Sets x∈A x belongs to A / x is an element (or a member) of A x∉A x does not belong to A / x is not an element (or a member) of A A⊂B A is contained in B / A is a subset of B A⊃B A contains B / B is a subset of A A∩B A cap B / A meet B / A intersection B A∪B A cup B / A join B / A union B A\B A minus B / the diference between A and B A×B A cross B / the cartesian product of A and B 3.Real numbers x+1 x plus one x-1 x minus one x±1 x plus or minus one xy xy / x multiplied by y (x - y)(x + y) x minus y,x plus y x y x over y = the equals sign x = 5 x equals 5 / x is equal to 5 x≠5 x (is) not equal to 5 x≡y x is equivalent to (or identical with) y x ≡ y x is not equivalent to (or identical with) y x > y x is greater than y x≥y x is greater than or equal to y x < y x is less than y x≤y x is less than or equal to y 0 < x < 1 zero is less than x is less than 1 0≤x≤1 zero is less than or equal to x is less than or equal to 1 | x | mod x / modulus x x 2 x squared / x (raised) to the power 2 x 3 x cubed x 4 x to the fourth / x to the power four x n x to the nth / x to the power n x −n x to the (power) minus n x (square) root x / the square root of x x 3 cube root (of) x x 4 fourth root (of) x x n nth root (of) x ( x+y ) 2 x plus y all squared ( x y ) 2 x over y all squared n!n factorial x ^ x hat x ¯ x bar x ˜ x tilde x i xi / x subscript i / x suffix i / x sub i ∑ i=1 n a i the sum from i equals one to n a i / the sum as i runs from 1 to n of the a i 4.Linear algebra ‖ x ‖ the norm (or modulus) of x OA → OA / vector OA OA ¯ OA / the length of the segment OA A T A transpose / the transpose of A A −1 A inverse / the inverse of A 5.Functions f( x ) fx / f of x / the function f of x f:S→T a function f from S to T x→y x maps to y / x is sent (or mapped) to y f'( x ) f prime x / f dash x / the (first) derivative of f with respect to x f''( x ) f double-prime x / f double-dash x / the second derivative of f with respect to x f'''( x ) triple-prime x / f triple-dash x / the third derivative of f with respect to x f (4) ( x ) f four x / the fourth derivative of f with respect to x ∂f ∂ x 1 the partial (derivative) of f with respect to x1 ∂ 2 f ∂ x 1 2 the second partial (derivative) of f with respect to x1 ∫ 0 ∞ the integral from zero to infinity lim⁡ x→0 the limit as x approaches zero lim⁡ x→ 0 + the limit as x approaches zero from above lim⁡ x→ 0 − the limit as x approaches zero from below log e y log y to the base e / log to the base e of y / natural log (of) y ln⁡y log y to the base e / log to the base e of y / natural log (of) y

基本混合运算的单词:add/plus/ and（加）,subtract/minus （减）,multiply/times（乘）,divide （除）32+18*3:thirty- two and eighteen times three [is equal to?](4+5)*6:the sum of four and five times six(22-8)/4:the difference between twenty two and eight divides by four13+1-19：thirteen plus one minus nineteen其实你说的顺序就跟中文里的差不多,XX和XX的和乘YY的ZZ （先说括号里的,一般情况下）如果是题目理解的话,基本上用上这些单词就明白了,如果是老师要求写的话,用这个顺序基本没错.标注：以上的单词中,第一个的都是动词,第二个但是名词,所以你可以稍稍注意一下语法 0w0~sum/ in total （和),difference (差),product （积）,quotient (商).其实在除法里你还会碰到其他的一些单词：divisor(除数）,remainder（余数）,divident （被除数)跟你说一声,这种基本运算的“应用题”很搞的.我当时囧了半天,那个is xxxx会很绕,碰到的时候要加油啊.