26 printable and digital pages for students to “fluently subtract within 100” (and play Tic-Tac-Toe): Subtract from 10Subtract from 20Subtract from 30Subtract from 40Subtract from 50Subtract from 60Subtract from 70Subtract from 80Subtract from 90Subtract from 100Subtract from the teens, Subtract from the twenties, Subtract from the thirties, Subtract from the forties, Subtract from the fifties, Subtract from the sixties, Subtract from the seventies, Subtract from the eighties, Subtract from the