A set of matchup cards to practice adding a set of 2-digit numbers mentally.
Use this resource when students are learning how to add a set of 2-digit numbers mentally, e.g., 24 + 28.
Print the cards on cardstock and cut them out. Store them in a resealable bag to be used over and over.
Students will match up the number sentence with the correct answer. For students needing extra support, let them use base-10 blocks to determine the answer.
This resource works well when used as a math center activity.