在数学中,经常见到括号．若对括号的认识不到位,会使解题过程变得复杂,甚至出错．下面就几种常见的类型!．谈谈括号的用法及技巧．1．列代数式(1)表示“和”或“差”与其它数或式之间的数量关系时,“和”或“差”要用括号括起来；(2)若式子是“和”或“差”的形式,且后面需要带单位名称时,要把整个式子用括号括起 In mathematics, you often see brackets. If the understanding of parentheses is not in place, the problem-solving process will become complicated and even make mistakes. Here are a few common types! Talk about the use of braces and tips. 1. When the column algebraic formula (1) represents the quantitative relationship between “and” or “difference” and other numbers or formulas, “and” or “difference” is enclosed in parentheses; (2) if the formula is “and” or “ In the form of ”poor", and when you need to include a unit name later, enclose the entire formula in parentheses.