How to say mathematical expression in Japanese
Here is a list of common mathematics notation in English and Japanese
| Form | English | Japanese |
|---|---|---|
| A plus B equals C | A 足す B は C | |
| A minus B equals C | A 引く B は C | |
| A times B equals C | A 掛ける B は C | |
| A divides B equals C | A 割る B は C | |
| A to the power B equals C<br>A raised to the Bth power equals C | A の B 乗は C | |
| X squared | X の二乗<br>X の自乗 | |
| X cubed | X の立方 | |
| one-half | 2 分の 1<br> | |
| two-third | 3 分の２<br> | |
| 14X over 5Y | 5Y 分の 14X<br> | |
| square root of A | A の平方根<br>A の自乗根<br>A の二乗根 | |
| third square root of A | A の三乗根<br>A の立方根 | |
| factorial of X | X の階乗 | |
| absolute value of X | X の絶対値 | |
| LN (or linn) X | X の自然対数 | |
| log of X, base b | ログ b の X | |
| 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 ( ) 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!