This is a great resource for Spanish I students who are just learning numbers (0-100) and Spanish II students who are reviewing them. Students solve addition problems in Spanish, but another student has the answer to their problems. Students must work their way through all the calculations to find their answer! Thirty-one problems are included. I have been using this resource for many years, and it keeps students engaged, helps them learn their numbers, and improves both their speaking and listening skills. Instructions included!