Get your 2nd graders adding 3-digit numbers (within 1,000) with these fun math riddle worksheets! Your students will stay engaged while they work through the mystery word puzzle, solving addition problems with and without regrouping covering CCSS 2.NBT.7. These math worksheets are no prep and work well as a math center, small group or for your early finishers! β¨ As students solve each problem, the answers become letters to a mystery word - the answer to the riddle! Product Includes:2 addition