I built this set of math manipulatives to provide my students with practice finding 1more, 1less, 10more, 10less. This set includes cut out windows for 1more /1less, 10more/10less, and combined as well. I first introduced these manipulates copied onto regular paper and had my first grade students cut them out (show them how to fold and snip to make a cut). Modeling how to use the manipulatives starting with the 1more/1less and moving to the combined 1more/1less/10more/10less. I made a copy of these for my classroom which I put on card stock and laminated. The paper manipulates I sent home with the provided hundreds sheet and instructions on how to use, to provide at home practice. I made a smaller set of the manipulatives for students to put in their math tool kits.