# How to say mathematical expression in Japanese

Here is a list of common mathematics notation in English and Japanese

Form English Japanese
$A+B=C$ A plus B equals C A 足す B は C
$A-B=C$ A minus B equals C A 引く B は C
$A \times B=C$ A times B equals C A 掛ける B は C
$A \div B=C$ A divides B equals C A 割る B は C
$A^B=C$ A to the power B equals C
A raised to the Bth power equals C
A の B 乗は C
$X^2$ X squared X の二乗
X の自乗
$X^3$ X cubed X の立方
$\frac{1}{2}$ one-half 2 分の 1
$\frac{2}{3}$ two-third 3 分の２
$\frac{14X}{5Y}$ 14X over 5Y 5Y 分の 14X
$\sqrt{A}$ square root of A A の平方根
A の自乗根
A の二乗根
$\sqrt[3]{A}$ third square root of A A の三乗根
A の立方根
$X!$ factorial of X X の階乗
$\|X\|$ absolute value of X X の絶対値
$\ln X$ LN (or linn) X X の自然対数
$log_bX$ log of X, base b ログ b の X
$\int (x^2-4x+9)dx$ integral of x squared minus 4x plus 9 x 二乗 引く 4x 足す 9 の積分
$()$ parentheses 丸括弧
$[]$ brackets 隅括弧

### Variables

Variables (A,B,C,X,Y) are read as is (but in Japanese accent). A is エー (e-), B is ビー (bi-), C is シー (shi-), X is エックス (ekkusu), Y is ワイ (wai), etc

### Katakana

Most of the times using katakana version of English noun/verb is ok, for example:

• It is common to hear プラス　$+$ and マイナス　$-$
• Integrals ($\int$) could be インテグラル (Integuraru) instead of the native Japanese (積分)
• In programming and mathematics, equals ($=$) could be イコール

Happy learning!

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