Learning Exercises for Section 1.3 To develop skill in problem solving, analyze the quantitative structure of situations or try other problem-solving heuristics. Feel free to draw diagrams to represent the relationships between relevant quantities. 1. Kelly's mom timed her as she swam a three-lap race in I minute 43 seconds. Her swimming coach timed Kelly only on her last two laps. Describe how Kelly might calculate how long it took her to swim the first lap, using the information from her mom and the coach. 2. Metcalf School has two third-grade rooms (A and B) and two fourth grade rooms (C and D). Together, rooms C and D have 46 students. Room A has 6 more students than room D. Room B has 2 fewer students than room C. Room D has 22 students. How many students are there altogether in rooms A and B? 3. Connie bought several types of candy for Halloween: Milky Ways, Tootsie Rolls. Reese's Cups, and Hershey Bars, Milky Ways and Tootsie Rolls together were 15 more than the number of Reese's Cups. There were 4 fewer Reese's Cups than Hershey Bars. There were 12 Milky Ways and 14 Hershey Bars, How many Tootsie Rolls did Connie buy