It's actually terrible, I forgot my book, and I'm stuck doing homework, and it's hard. I'm in fifth grade.
6. List all of the numbers up to 20 that can be arranged into arrays with two rows.
16, and 20, there's more but.
7. What do you call numbers listed in problem 6?
20 can be represented by two factors, 4,5
16 can be represented by two factors, 8,2
What about 18? 14?
Start with four and work up, see if you can find two factors of each number.
The numbers are called factors.