数式（すうしき、suushiki）
- formula (math)

The Japanese word 数式 (数式; *sūshiki*) refers to a mathematical expression or formula. It represents a combination of numbers, variables, symbols, and operations that express a mathematical relationship or calculation. It's essentially the language of mathematics. ⚫︎ It is used to represent quantities, relationships between quantities, or to solve problems. ⚫︎ A 数式 can range from simple equations like 2 + 2 = 4 to complex formulas used in advanced fields like physics or engineering. ⚫︎ The term encompasses both equations (with an equals sign) and expressions (without an equals sign).

⚫︎ 二次方程式の解を求める数式を教えてください。 Translation: Please tell me the formula for finding the solution to a quadratic equation. ⚫︎ この物理の問題を解くには、複雑な数式を使う必要があります。 Translation: To solve this physics problem, we need to use a complex formula. ⚫︎ プログラミングでは、様々な数式が使われます。 Translation: Various formulas are used in programming.

You use 数式 when discussing mathematical expressions or formulas in any context. ⚫︎ It's common in mathematics classes, science discussions, engineering projects, and any situation where you are dealing with calculations or mathematical relationships. ⚫︎ You can use it in questions (e.g., この数式は何を意味しますか？ - "What does this formula mean?"), statements (e.g., 私はこの数式を理解しました。 - "I understand this formula."), or instructions (e.g., この数式を使って計算してください。 - "Please calculate using this formula.").

The word is written in kanji as 数式. ⚫︎ The reading, in hiragana, is すうしき. ⚫︎ The word is always written this way. There are no other variations or differences in the way the okurigana is used.

There are no direct synonyms for 数式, as it is a specific term. However, depending on context, related terms might include: ⚫︎ 方程式 (*hōteishiki*) - equation ⚫︎ 計算式 (*keisanshiki*) - calculation formula ⚫︎ 公式 (*kōshiki*) - formula (in general)

There aren't direct antonyms for 数式, as it represents a concept. You might contrast it with: ⚫︎ 言葉 (*kotoba*) - words (in a non-mathematical context) ⚫︎ 文章 (*bunshō*) - sentences (in a non-mathematical context)

数学の授業で、様々な数式を学びました。 ・Translation: In math class, I learned various formulas. ・Explanation: This sentence describes the experience of learning formulas in a mathematics class.

彼はその数式を使って、問題を解くことができました。 ・Translation: He was able to solve the problem using that formula. ・Explanation: This sentence shows how a formula can be used to solve a problem.

The word 数式 is formed from two kanji: ⚫︎ 数 (*sū*) meaning "number," "quantity," or "count". ⚫︎ 式 (*shiki*) meaning "formula," "expression," or "form." Together, they accurately describe a mathematical expression that deals with numbers.