Choose the property of operation of integers that is illustrated in each statement. Write the letter of the correct answer on the space provided.
1. 12 + 7 = 7+12
19 = 19
2. 25 + 57 = 82
3. (3)(6) = (6)(3)
18 = 18
4. (6+8)+13 = 6 + (8+13)
14+13 = 6+21
27 = 27
5. 5 (3+2) = (5)(3) + (5)(2)
5(5) = 15 + 10
25 = 25
