比的表示

使用比的记法描述两个或多个数量之间的关系，将比化简为最简形式，并在比与分数表示之间进行转换。

Use ratio notation to describe the relationship between two or more quantities, simplify ratios to their simplest form, and convert between ratio and fraction representations

学习证据 / Evidence

• 从应用题中写出比并化简（例如 12:8 = 3:2）
• 将比转换为整体的等价分数（例如 3:2 表示 3/5 和 2/5）
• 通过找到公倍数来化简含小数或分数的比

• Write a ratio from a word problem and simplify it (e.g. 12:8 = 3:2)
• Convert a ratio to equivalent fractions of a whole (e.g. 3:2 means 3/5 and 2/5)
• Simplify ratios involving decimals or fractions by finding a common multiplier

评估问题 / Assessment

如果一份冰沙食谱中橙汁和芒果汁的比是 3:2，{{name}} 能化简这个比、把它表示为分数，并算出在给定总量下每种果汁各需要多少吗？

If a smoothie recipe uses orange juice and mango juice in the ratio 3:2, can {{name}} simplify that ratio, express it as a fraction, and work out how much of each is needed for a given total amount?