Super-heroes are coming to your 4th grade students' rescue with these fun task cards that cover math Common Core standard 4.OA.A.3. These word problems cover all areas of the standard including multi-step problems, dealing with remainders, equations with a letter for an unknown quantity, rounding and estimation, and using guess and check to assess the reasonableness of answers.Special Features of this Task Card SetSimple for students and teachers to useCan be adapted to many different lesson obj