运用简单公式
Using Simple Formulae
使用以文字或符号表示的简单公式来计算数值（例如：perimeter = 2 × (length + width)）
Use simple formulae expressed in words or symbols to calculate values (e.g. perimeter = 2 × (length + width))
学习证据 / Evidence
- 将数值代入 P = 2(l + w) 求出长方形的周长
- 已知底和高的值，利用三角形面积公式（A = 1/2 × b × h）求面积
- 理解用文字表达的公式，并用它计算出结果
- Substitute values into P = 2(l + w) to find the perimeter of a rectangle
- Use the formula for area of a triangle (A = 1/2 × b × h) given base and height values
- Interpret a formula expressed in words and use it to compute an output
评估问题 / Assessment
如果告诉 {{name}} 长方形的周长公式是 perimeter = 2 × (length + width)，他们能否代入测量值并算出答案？
If {{name}} is told that the perimeter of a rectangle uses the formula perimeter = 2 × (length + width), can they plug in the measurements and work out the answer?