Which TWO situations illustrate that the sum of opposite numbers is zero?
Responses
A Shelley finds $50 in an old purse and deposits it in her bank account.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.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.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.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 12 degrees above zero.
B and E.
In situation B, Sara deposits $500 in her checking account, which can be represented as a positive number, and then withdraws $500 from the ATM, which can be represented as a negative number. The sum of these opposite numbers is zero.
In situation E, the temperature at daybreak is 18 degrees below zero, which can be represented as a negative number, and at noon, the temperature is 12 degrees above zero, which can be represented as a positive number. The sum of these opposite numbers is zero.