It can be understood that if there is a cat and five dogs, and the cat+dog * * * is 6, corresponding to 24, then one is 24/6=4, so there are four cats and 4*5=20 dogs.
Mathematics teaching should be based on students' life experience and existing knowledge background, and provide them with sufficient opportunities to engage in mathematics activities and exchanges. The cultivation of students' problem consciousness depends on teachers' teaching design.