You may know the author Pat Hutchins and her books for young children, such as Rosie’s walk, Changes changes, Clocks and more Clocks, etc. I bought a few when my children Rosie and Tom were younger, and “The doorbell rang” was one of them. I had almost forgotten about them, until I recently heard Rosie, second grade, say:
“I recognize this book ! We read it in math today !”
So we read it again. The text is attractive as it includes predictable sentences that young children enjoys repeating out loud. And for older kids, the story opens the door to math. Ma made cookies for her two children, Sam and Victoria to share (equally). The doorbell rings, and two more children, Tom and Hannah come and share the cookies. As the doorbell keeps riging, more children come to share the cookies, until twelve children have to share the twelve cookies.
As I was reading the story, Rosie modeled it. She used flashcards to represent the cookies, similarly to what she has been doing with Time 4 Fractions.
 At the beginning of the story, Sam and Victoria gets 6 cookies each. How many cookies has Ma baked?
 Now that they have to share the 12 cookies among 6 children, how many cookies does each child get?
But a fun activity we added was to twist the story a little, and work not only with whole numbers, but also fraction. You may want to give it a try. I just let my child make sense of the problem, whether using paper to cut, or buttons to count, or the base Ten Blocks. Sometimes, she connects her model to symbols she has learned at school. But the goal is to let her make sense of the problem.

What if Tom does not want any cookie, i.e. three children share the twelve cookies, how many cookies does each child get ?

What if Peter does not want any cookie, i.e. five children share twelve cookies many cookies does each child get ?

What if Tom, Peter and Victoria do not want any cookie i.e. nine children share twelve cookies many cookies does each child get ?
I always look for opportunities for my children to have fun exploring problems, and make sense of them. “The doorbell rang” sure is a neat book to create such opportunities.
Give it a try ! I am here if you have any questions !