It was -2 degrees this morning but by afternoon it was 21 degrees. What was the change in temperature?
The change in temperature was 23 degrees.
To find the change in temperature, subtract the initial temperature (in the morning) from the final temperature (in the afternoon).
Final temperature - Initial temperature = Change in temperature
21 degrees - (-2 degrees) = 21 degrees + 2 degrees = 23 degrees
Therefore, the change in temperature was 23 degrees.
To find the change in temperature, you need to subtract the initial temperature from the final temperature. In this case, the initial temperature is -2 degrees and the final temperature is 21 degrees.
Change in temperature = Final temperature - Initial temperature
Change in temperature = 21 degrees - (-2) degrees
To subtract a negative number, you can change it to a positive number and then perform the addition.
Change in temperature = 21 degrees + 2 degrees
Change in temperature = 23 degrees
Therefore, the change in temperature is 23 degrees.