Answer:
The sum is -14
Explanation:
To solve this problem , first you should look at key words. The key word is SUM. What does sum mean? Sum means ADDING or addition. So, you know what operation to use and then ADD the values of the 3 cards. -12+3+-5 = -14.
So the sum of the values are Of LuAnn's three cards is -14. Hope it helps!
~ Happy holidays