Question: At sunset, a thermometer had a reading of 4°F. During the night, the temperature decreased 15°F. After the decrease, what is the total number of degrees that the temperature must change for the thermometer to read 0°F?
A) 4°F
B) 11°F
C) 15°F
D) 19°F
Correct answer: B
Grade: 7 | Topic: Number System | Difficulty: Medium | Standard: 7.NS.A.1b