This activity I made to help my students with their number sense abilities. It's a great tool to use to really have the kiddos think in terms of number order and sequencing, as well as increasing by 10, and decreasing a number by 10. I have included 4 different worksheets, that offer a variety of numbers up from the 10's to 90's...all 2 digit only. This version is a differentiated version to my other, challenging ones. These worksheets you can utilize whole group, small group, or independentl