This Instructional Activity is a part of the Lesson 24, Unit 4, Grade 6. Guide students in how to use mental math to answer the questions. Students do not know how to solve one-step equations using a formal method; therefore, they need guidance in solving these problems. Please note that the second problem includes the use of subtraction to get a negative value. While operations with integers is a Grade 7 topic, this example should be accessible using a visual model.