Looking at the picture below, we have a total of $\displaystyle 15$ oranges and $\displaystyle 5$ boxes. Each box has $\displaystyle 3$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 15\div5=o$

$\displaystyle 3=o$

Looking at the picture below, we have a total of $\displaystyle 12$ oranges and $\displaystyle 4$ boxes. Each box has $\displaystyle 3$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 12\div4=o$

$\displaystyle 3=o$

Looking at the picture below, we have a total of $\displaystyle 9$ oranges and $\displaystyle 3$ boxes. Each box has $\displaystyle 3$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 9\div3=o$

$\displaystyle 3=o$

Looking at the picture below, we have a total of $\displaystyle 10$ oranges and $\displaystyle 2$ boxes. Each box has $\displaystyle 5$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 10\div2=o$

$\displaystyle 5=o$

Looking at the picture below, we have a total of $\displaystyle 15$ oranges and $\displaystyle 3$ boxes. Each box has $\displaystyle 5$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 15\div3=o$

$\displaystyle 5=o$

Looking at the picture below, we have a total of $\displaystyle 20$ oranges and $\displaystyle 4$ boxes. Each box has $\displaystyle 5$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 20\div4=o$

$\displaystyle 5=o$

Looking at the picture below, we have a total of $\displaystyle 25$ oranges and $\displaystyle 5$ boxes. Each box has $\displaystyle 5$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 25\div5=o$

$\displaystyle 5=o$

Looking at the picture below, we have a total of $\displaystyle 20$ oranges and $\displaystyle 2$ boxes. Each box has $\displaystyle 10$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 20\div2=o$

$\displaystyle 10=o$

Looking at the picture below, we have a total of $\displaystyle 40$ oranges and $\displaystyle 4$ boxes. Each box has $\displaystyle 10$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 40\div4=o$

$\displaystyle 10=o$

Looking at the picture below, we have a total of $\displaystyle 50$ oranges and $\displaystyle 5$ boxes. Each box has $\displaystyle 10$ oranges in it. 

Because we are splitting the oranges up into equal groups, this is a division problem. 

Let's let $\displaystyle o$ equal the total number of oranges per box. 

Our equation is $\displaystyle 50\div5=o$

$\displaystyle 10=o$