According to the meaning of the question, three cats eat three mice in three days, divided by, 1 day, how many mice do three cats eat?

The formula is: 3/3= 1, that is, three cats eat 1 mouse a day.

There are 18 mice, which need to be eaten in 6 days. Calculate the number of mice that need to be eaten every day by division.

List as: 18/6=3, that is, you need to eat 3 mice every day.

Three cats used to eat 1 mouse a day, but now they need to eat three mice a day. By multiplication, the number of cats needed can be calculated.

Column: 3*3=9, that is, 9 cats are needed.

So three cats ate three mice in three days. According to this calculation, nine cats eat 18 mice in six days.

Extended data:

This kind of problem is a cat-and-mouse intelligence problem in mathematical application problems. Matters needing attention in solving such problems:

1, you can't simply use division to calculate how many mice each cat eats every day;

2. You can't simply use multiplication to calculate how many mice a cat has eaten in a few days;

3. It is necessary to consider the cooperation between cats. For example, in this problem, three cats eat a mouse together;

What needs to be considered is that many cats start eating mice at the same time, not one after another, so they can't simply add them in time.

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