除法中的未知因数
Division as Unknown Factor
理解除法是求未知因数的运算(例如,计算32 ÷ 8时,可以先想哪个数乘8等于32)。
Understand division as an unknown-factor problem (e.g. find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8)
学习证据 / Evidence
- 说明32 ÷ 8 = ? 和 8 × ? = 32 是同一回事
- 利用已知的乘法口诀来求出除法答案
- 描述乘法和除法互为逆运算的关系
- Explain that 32 ÷ 8 = ? is the same as 8 × ? = 32
- Use a known multiplication fact to find a division answer
- Describe the relationship between multiplication and division as inverse operations
评估问题 / Assessment
{{name}}能否通过问“8乘几等于32?”来算出“32 ÷ 8”——也就是用乘法口诀而不是单独的除法方法?
Can {{name}} work out '32 ÷ 8' by asking 'what do I multiply 8 by to get 32?' — using times table knowledge rather than a separate division method?