简单同分母分数加减
Simple Fraction Sums
在不超过一个整体的范围内，进行同分母分数的加法和减法（例如 5/7 + 1/7 = 6/7）。
Add and subtract fractions with the same denominator within one whole (e.g. 5/7 + 1/7 = 6/7)
学习证据 / Evidence
- 计算 2/5 + 2/5 = 4/5
- 计算 6/8 − 3/8 = 3/8
- 解释当分母相同时，只需将分子相加或相减
- Calculate 2/5 + 2/5 = 4/5
- Calculate 6/8 − 3/8 = 3/8
- Explain that when denominators are the same, you add/subtract the numerators
评估问题 / Assessment
如果一个食谱需要 2/8 杯牛奶，之后又需要 3/8 杯，{{name}} 能不用计算器算出总量吗？
If a recipe calls for 2/8 of a cup of milk and then another 3/8 of a cup, can {{name}} work out the total without a calculator?