Word Problem

Tasha and Kaitlyn love watermelon!  Their mom just brought one home from the store and cut it up for them to share. Tasha ate 8 pieces and Kaitlyn ate 7 pieces.

Hint:  If it helps, draw the pieces if watermelon in the space below.

Write the math equation: ______________________

How many pieces did the girls eat?  _______

Show your work!