What's the greatest number of time you would regroup when multiplying a 3-digit factor by a 2-digit factor?

Question

Give an example please
I'm a 5th grade student
I;m using my father account

Answer 1

I don't understand your question. Do you mean using the associative law?

abc*de =
cba*de =
bca*de =
acb*de =
cab*de =
bac*de
Now all of these are multiplied by the two ways to postiion de

That's 3! = 6
times 2! = 2

for a total of 12.

For a 5th grader I'm sure that you're just supposed to list all 12. For convenience, note that I've put each letter in the middle and switched the other two. For neatness, I'd recommende just putting another column to the right of each of these 6 with de and ed .
When doing counting like this, called combinotorics, it's helpful to arrange things neatly.