Just in time for Fall. This can be used as a cooperative group or center activity. Cut along the dotted lines and have students solve each problem on a white board. I used these to reinforce the skill of adding 3 addends. I had my students explain which strategy they used to solve the problem: whether it was a doubles, doubles plus one, doubles minus one or making a 10 to solve. My students really enjoyed these. I hope yours do too!