Answer :
To find the opposite of a number, you simply change its sign. The opposite of a positive number is a negative number with the same absolute value, and vice versa.
Let's find the opposite of 79:
1. Start with the number 79, which is positive.
2. To find its opposite, we change its sign from positive to negative.
Therefore, the opposite of 79 is -79.
So, the correct answer is option D: -79.
Let's find the opposite of 79:
1. Start with the number 79, which is positive.
2. To find its opposite, we change its sign from positive to negative.
Therefore, the opposite of 79 is -79.
So, the correct answer is option D: -79.