temperature before change = 40 degrees
temperature change =up 7 degrees
identify the number model below that is correct. then cross out the incorrect model and complete the correct one.
40+7=? or 40+(-7)=?
To identify the correct number model for this situation, we need to understand the concept of temperature change.
Since the original temperature is 40 degrees and it increases by 7 degrees, we can represent the temperature change as an addition operation.
Let's evaluate both number models and determine which one is correct:
1. 40 + 7 = ?
This number model represents an increase of 7 degrees from the original temperature of 40 degrees.
2. 40 + (-7) = ?
This number model represents a decrease of 7 degrees from the original temperature of 40 degrees.
Now, let's evaluate each option to determine the correct answer:
1. 40 + 7 = 47
This number model implies that the temperature increased by 7 degrees. This is the correct model for this situation.
2. 40 + (-7) = 33
This number model implies that the temperature decreased by 7 degrees. This is not the correct model for this situation.
Therefore, the correct number model is "40 + 7 = 47".