Mental math. It causes so many students anxiety, but it’s a critical skill to be able to do more complex math. I’ve seen ideas similar to this, but they seem to use more prep (like writing things on craft sticks), so I’ve made my own. If you want each student to complete this puzzle, I recommend giving this page to each student, having them cut out the strips and glue them on a piece of paper in the right order. If you only want one set for your classroom, be sure to print it on card stock and then laminate the strips so they last longer!