列代数方程

用字母表示未知数，把缺数问题用代数形式表达出来；把文字题转化为方程。

Express missing number problems algebraically using letters for unknowns; translate word problems into equations

学习证据 / Evidence

• 把“我想了一个数，把它加倍，再加5得到17”写成 2n + 5 = 17
• 解出如 3x = 24 这样的一步方程，并说明推理过程
• 将一个文字题表述为代数方程，并求出未知数的值

• Write 'I think of a number, double it, and add 5 to get 17' as 2n + 5 = 17
• Solve a one-step equation such as 3x = 24 and explain the reasoning
• Express a word problem as an algebraic equation and find the unknown value

评估问题 / Assessment

如果{{name}}读到“我想了一个数，把它加倍，再加5得到17”，他能否用字母表示未知数列出方程并求解？

If {{name}} reads "I think of a number, double it, and add 5 to get 17," can they write that as an equation using a letter for the unknown and solve it?