These activity cards are a terrific review for multiplying fractions. These activity cards can be used as review in small groups, during station work, or independent work. They can be posted around the classroom so the students have to get up and move to find and solve the different math problems, thus keeping their minds and bodies more alert. Once students have solved a problem, or all of them, they can use a device with a QR code reader to scan the QR codes and independently check the answers.