My students needed another practice activity with estimating 2-digit sums and differences. I used this for small group remediation, but it could also be used for an assessment, guided or independent practice, or even morning work or homework. I also encouraged my students to use various strategies which I reminded them of in the directions, but that is an option. I hope this can help you too! I have many other estimating activities available as well for the various seasons (Thanksgiving and Snowman/Winter), and non-themed like this one. Thanks!