等值分数(8岁以上)
Equivalent fractions (age 8+)
生成简单的等值分数,并利用可视化分数模型解释它们为什么相等。
Generate simple equivalent fractions and explain why they are equivalent using visual fraction models
学习证据 / Evidence
- 给定1/3,生成等值的2/6,并用面积模型表示出来。
- 将4/8化简为1/2,并用分数条说明理由。
- 完成等值分数链:1/4 = ?/8 = ?/12。
- Given 1/3, generate 2/6 as equivalent and show with area model
- Simplify 4/8 to 1/2 and justify with a fraction strip
- Complete equivalence chains: 1/4 = ?/8 = ?/12
评估问题 / Assessment
如果向{{name}}展示一个被分成3份且其中1份涂色的分数条(即1/3),{{name}}能否画出一个分成6份的等值分数条,并涂上完全相同的面积?
If {{name}} is shown a fraction bar split into 3 parts with 1 shaded (= 1/3), can they draw an equivalent bar with 6 parts that shows exactly the same amount shaded?