Use these activities to help your students gain a deeper understanding of the equal sign and practice strategies for adding three numbers. Included are three sets of expression cards, a set of sum cards, and equal signs. The expression cards include joining three addends using the make a ten strategy; joining three addends using doubles; and adding ten to a one digit number. There are eight expression cards in each set.
The directions include four different ways to use the cards to practice addition strategies and showing equivalence.
I suggest copying the cards on card stock and laminating for use as a partner activity or in centers once students understand the concepts. The pages could also be copied and used as a cut and paste matching activity for students.
These activities align with the Common Core Standards for Math in Operations and Algebraic Thinking. (1.OA.3, 1.OA.6, and 1.OA.7).