Practice basic addition and subtraction has never been so engaging, yet challenging. Purchase these 18 differentiated arithmetic brain teasers that come in multiple formats! The first 6 puzzles contain solutions of less than 50 to build up the student's confidence. Gradually, the questions become increasingly complex with values less than 100. They will surely tickle the students' brains as they logically problem solve what value represents each picture. As an added bonus, reward studen