9 - (-15) =
9 - (-15) = 24
To subtract a negative number, you can follow these steps:
Step 1: Keep the first number the same. In this case, the first number is 9.
Step 2: Change the minus sign (-) to a plus sign (+). So, -(-15) becomes +15.
Step 3: Add the two numbers together. So, 9 + 15 = 24.
Therefore, 9 - (-15) = 24.