Arrays are objects or pictures arranged into rows and columns. You can use arrays to represent and solve division problems.
This array has 15 dots in total. The dots are arranged in 3 rows.
Each row has 5 dots.
You can use these numbers to write a division sentence that matches the array:
So, when you divide 15 dots into 3 rows, you get 5 dots in each row.
Let's try another example. Use an array to divide Use 18 dots in total. Make 6 rows of dots.
There are 3 dots in each row. So, 
