+): 12 + 5 = 17. Adds the two numbers together.-): 12 - 5 = 7. Subtracts the second number from the first.*): 12 * 5 = 60. Multiplies the numbers./): 12 / 5 = 2.4. Divides the first number by the second.%): 12 % 5 = 2. Returns the remainder after whole-number division.