现实情境中的分数乘法

解决现实情境中涉及分数和带分数乘法的实际问题，使用直观分数模型或方程。

Solve real-world problems involving multiplication of fractions and mixed numbers, using visual fraction models or equations

学习证据 / Evidence

• 解答：“一个食谱需要 2 又 1/3 杯面粉；你想做 1 又 1/2 份。需要多少面粉？”
• 画一个分数模型来表示并解决一个分数乘法应用题。
• 结合情境用估算判断分数乘积是否合理。

• Solve: 'A recipe needs 2 1/3 cups of flour; you want to make 1 1/2 batches. How much flour?'
• Draw a fraction model to represent and solve a multiplication word problem
• Check the reasonableness of a fraction product in context using estimation

评估问题 / Assessment

如果一个食谱用 1 又 1/2 杯糖可以做 12 块饼干，{{name}} 只想做食谱的 2/3，他们能算出需要多少糖吗？

If a recipe makes 12 biscuits using 1 and 1/2 cups of sugar, and {{name}} wants to make only 2/3 of the recipe, can they work out how much sugar they need?