Use the simplest example to teach children to understand the operation correctly (for example, if you have 10 apples, how many apples do you eat every day if you eat 3 apples in 3 days? How many apples do you have left? ..... and so on. )

Then teach him (her) how to examine questions (such as the above question, the first question: how much do you eat every day? Known total: 3, three days to eat, divided by division)

OK or not?