Students will round numbers from to the nearest tens place to the nearest millions place. They will estimate to find sums and differences and read and estimate to find the answers to addition and subtraction estimation word problems. Print the included Bingo cards (35) and students will work hard to find the estimate on over 30 slides! My students beg to play, and while playing they'll do more math operations in this simple game than they would on any worksheet. Instructions for Bingo included. After playing Bingo once a few days later we reviewed again by racing to find answers. Both ways are a great review of Estimation!