奇数或偶数

判断一组物体（最多20个）的数量是奇数还是偶数

Determine whether a group of objects (up to 20) has an odd or even number of members

学习证据 / Evidence

• 把物体两两配对，判断是否有一个剩余（有剩余为奇数，没有剩余为偶数）
• 两个两个地数一组物体，判断总数是否为偶数
• 写出一个等式，把偶数表示成两个相同加数的和（例如 8 = 4 + 4）

• Pair objects and determine whether there is one left over (odd) or not (even)
• Count a group by 2s to determine if the total is even
• Write an equation to express an even number as a sum of two equal addends (e.g. 8 = 4 + 4)

评估问题 / Assessment

如果{{name}}有一组共14个物体，他们能不能告诉你这个数是奇数还是偶数？例如，通过两两配对，看看有没有剩下一个。

If {{name}} has a group of 14 objects, can they tell you whether that number is odd or even — for example by pairing them up to see if any are left over?