两步方程
Two-Step Equations
解决涉及四则运算的两步应用题；能够用含字母表示未知数的等式来表述问题，并求出未知数。
Solve two-step word problems using the four operations; represent problems using equations with a letter standing for the unknown quantity
学习证据 / Evidence
- 解决一个将加减法与乘除法结合的两步问题
- 用一个字母表示未知数来写出等式（例如 3 × n + 5 = 26）
- 通过估算和心算来评估答案的合理性
- Solve a two-step problem that combines addition/subtraction with multiplication/division
- Write an equation using a letter for the unknown (e.g. 3 × n + 5 = 26)
- Assess the reasonableness of the answer using estimation and mental computation
评估问题 / Assessment
{{name}}能否写出像“n + 25 = 60”这样的等式来表示一道应用题，并解出n的值？
Can {{name}} write an equation like 'n + 25 = 60' to represent a word problem, and then solve it to find what n equals?