Word Problem

Sarah and Joey spent the entire afternoon playing in the snow.  When they came in they decided to have some hot chocolate to warm up.  Sarah added 1 marshmallow to her mug.  Joey dropped 6 marshmallows in his hot chocolate. 

Hint:  If it helps, draw the marshmallows in the space below.

Write the math equation: ______________________

How many marshmallows did Sarah and Joey use in all?  _______

Show your work!