A handy resource for mastering story problems when both addends are unknown. You have the ability to edit and add slides. Go ahead and change the numbers to create even more problems! 10 different slides for interactive whiteboard, handouts, centers, or small-group practice. You also get a Steps to Solving Story Problems slide, one Sample Organizer, and one Sample Illustrations slide. I hope you enjoy, and keep looking back as I will continue to add more sets. Other sets include up to 20 slides.