数式

1. Origins, structure, and basic meaning

• Structure: 数式 is read すうしき and means a mathematical expression written with numbers, letters, and symbols.
• Basic usage: It is used when copying an expression from a board or substituting values to find an answer.

2. Common pitfalls and similar expressions

• Expression and calculation
  • 数式 refers to the written expression, while 計算 describes the process of calculating a result.
• Substituting a value
  • In 数式に値を入れる, に marks the expression into which a value is substituted.