数学　英語の読み方

整数(Integer)

• 123
one hundred (and) twenty three

• 3,456
three thousand four hundred (and) fifty six

• 12,345
twelve thousand three hundred (and) forty five

少数(Decimal)

• 7.01
seven point 0 one

• 0.19
0 point one nine

• 3.1412
three point one four one two

分数(Fraction)

• a/b
a over b

• 1/2
a half　または　one half

• 1/3
a third　または　one third

• 1/4
a quarter

• 1/10
one tenth

• 1/12
one twelfth

• 2/3
two thirds

• 3/4
three quarters

• 5/12
five twelfths　または　five over twelve

指数(Index)

• a2
a squared

• 52
five squared

• b3
b cubed

• xN
x to the Nth power　または　x to the power N　または簡単に　x to the N

• x to the minus Nth power　または　x to the power minus N　または簡単に　x to the minus N

N乗根(Nth root)

• the square root of x　または簡単に　root x

• the cube root of x　または簡単に　cube root x

• the Nth root of x

• the Nth root of x to the power m

対数(Logarithm)

• log of x to the base ten

• log of x to the base a

• log of x

• log of x to the base e

• natural log of x

下付文字(Subscript)

• X subscript one　または簡単に　X sub one

• X sub n

• A sub xy

上付文字(Superscript)

• x prime

• x double prime

記号

• therefore

• because　または　since

• infinity

• ( )
parentheses

• (a)
a in parentheses

• (
parenthesis open　または　initial parenthesis

• )
parenthesis close　または　final parenthesis

• { }
braces

• {
brace open　または　initial brace

• }
brace close　または　final brace

• [ ]
brackets

• [
bracket open　または　initial bracket

• ]
bracket close　または　final bracket

数式, 不等式

• a equals b　または　a is equal to b

• a is not equal to b

• a is identical with b

• a is nearly equal to b

• a is asymptotic to b

• a plus b equals c

• a minus b equals c

• a plus or minus b equals c

• a x squared plus b x minus c equals zero

• a divided by b equals c

• a times b equals c　または　a multiplied b equals c

• a over b times c plus d in parenthesis

• a is greater(またはmore) than b

• a is much greater(またはmore) than b

• a is smaller(またはless) than b

• a is much smaller(またはless) than b

• a is greater than or equal to b

• a is smaller than or equal to b

• function of x

• differential of x

• derivative of x with respect to t

• the second derivative of x with respect to x

• partial derivative of y with respect to x

• integral sign

• integral between the limits x equals a and b of the function of x dx

• capital sigma(summation sign)

• the sum of all terms of x sub i from i equals one to i equals n