実数

じっすう

real number; actual number (as opposed to a speculative number); true number

Common word

Meanings

Noun
real number
actual number (as opposed to a speculative number); true number

Example sentences

これは実数じっすうですか？

Is this a real number?
これって、実数じっすうなの？

Is this a real number?
実数じっすうの集合しゅうごうは加法かほうについて閉とじている。

The set of real numbers is closed under addition.
𝑥² = −1 となる数 ��（実数ではない）を sqrt(−1) または i と記しるしてして虚数きょすうたんい単位とという言う。

When x² = −1, the number x (which is not a real number) is written as "sqrt(−1)" or "i", and is called the imaginary unit.