Do your students need some extra practice with the Common Core standard of 10 more and 10 less? How about number sequence? Here are 20 pages of number grid puzzles. On each beach themed page students will use their number sense to fill in the missing numbers on each puzzle piece from the 100s chart. Each page contains five or six puzzle pieces.This activity is great to use at stations, independent seatwork, or daily morning work. Consider following me for updates and more freebies! Hope you enjoy.