Collaborative activity.\n\nCut each page into the three columns indicated. Give one question from the first page to each student in a group of three, so that they each have different questions. Students complete the first step of the question and write their answer in the first blank box. They then fold the top of the paper down so that the answer and original questions are not visible. They pass it to the next person, who does they've finished the first three problems, they check what mistakes they have made.\n\nThanks to @bowmanimal for the idea.