Do your students need develop their number sense skills? Practice with 1 more, 1 less, 10 more, and 10 less? If they do this pack is a perfect way to practice these skills in a independent hands-on way! Use the prepared 1 more, 1 less, 10 more, and 10 less number cards or use the blank 1 more, 1 less, 10 more, and 10 less to create your own numbers. The ideal resource where differentiation is needed. #mathcenters #numbersense #youclevermonkey