I created this pack of leveled worksheets to help my students strengthen their number sense skills. They take the number in the bunny's belly and add 10 more, subtract 10 less, add 50 more and subtract 50 less for the 2-digit page, and for both of the 3-digit pages, they add 10 more, subtract 10 less, add 100 more and subtract 100 less. The first page contains 2-digit numbers. The second page contains 3-digit numbers in the 100's. The third page contains various 3-digit numbers up to the 900's. I plan to use all 3 sheets at various points in the year with all of my students. A great Springtime activity to review and practice!