等值分数

认识并会用图形表示较小分母的等值分数

Recognise and show, using diagrams, equivalent fractions with small denominators

学习证据 / Evidence

• 用等分图形说明1/2 = 2/4
• 利用分数墙或条形模型找出等值分数
• 通过比较涂色部分的面积，解释两个分数为什么等值

• Show that 1/2 = 2/4 using a diagram of equal parts
• Use a fraction wall or bar model to find equivalent fractions
• Explain why two fractions are equivalent by comparing the shaded areas

评估问题 / Assessment

如果{{name}}看到一条长条被平均分成4份，其中2份涂了颜色，能不能说出这就是1/2，并画出另一条长条用不同方式来表示同样多的部分？

If {{name}} sees a bar divided into 4 equal parts with 2 shaded, can they tell you that's the same as 1/2 — and draw a different bar showing the same amount another way?