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  1. The answers in each case are:

    a. 42.

    b. 122.

    Step-by-step explanation:

    In the first case, you should know that the temperature is calculated from the highest temperature to the lowest, in which case:

    82 - 40 = 42.

    In the second case, when temperatures are negative, you must first bring them to zero and then calculate with the largest positive number, as shown below:

    82 + 40 = 122.

  2. 1a. 82 is 42 degrees warmer than 40.

    1b. 82 is 122 degrees warmer than -40.

    Step-by-step explanation:

    1a. 82-40=42

    1b. -40+40=0

    0+82=82

    82+40 = 122

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