Directions: Using the digits 1 to 5, at most one time each per number sentence, fill in the boxes to create two or more true number sentences.
What are the largest addends you could use?
What’s an example of addends you couldn’t use? Why not?
1 + 2 = 3
1 + 3 = 4
1 + 4 = 5
Be sure to watch for students who use more than one number twice. Number tiles may be useful to prevent this.
Source: Robert Kaplinsky