You can talk to other students about a problem.
 

Let's look at some examples.

Sally and Sam are discussing a problem. 
They need to find out how many cups are in a quart. 
Sally says there are 2 cups in a quart, but Sam disagrees. 
Sam explains to Sally that since there are 2 cups in a pint and 2 pints in a quart,
that means that there are 4 cups in one quart.
Sam shows this example to Sally.
  +    =  
  +    =
  + + + =

This example helped Sally to understand how her answer was incorrect.
 

Mimi and Max are shopping. 
They want to buy 2 notebooks that cost $2.25 each. 
They only have $5.00. 
Mimi says they have enough money, but Max is not sure. 
Mimi shows him the following example:

 +  = $4.50

This example helped Max to understand that $5.00
was enough money to buy 2 notebooks.
 

It is helpful to discuss problems with a friend.