Help your students master the task of deciding when a problem is an addition problem or a subtraction problem by working through this presentation. The lesson focuses on helping students decide what is happening in a word problem and finding possible clue words. There are places for students to stop and discuss what they have learned and practice identifying the operation in a problem at the end. Students are not asked to solve problems -- only to identify the operation. You could also have them set the problem up or solve it, but that would extend the lesson time considerably.
To operate the hyperlinks in the practice problems at the end, be sure to click on the picture.