Which situations illustrate that the sum of opposite numbers is zero? Which situations illustrate that the sum of opposite numbers is zero? A) Shelley finds $50 in an old purse and deposits it in her bank account.
B) Sara deposits $500 in her checking account and withdraws $500 from the ATM. C) After 3 forward flips and 3 backward flips, Anna is back where she started.
D) Evan wins 1,000 points on a video game and wins another 1,000 points on the next game.
E) At daybreak, the temperature is 18 degrees below zero. The temperature at noon is zero