Adding Integers Answers

Sean says that to add a number to –100 and still have –100 is to add zero. Candice says that she can add two numbers to –100 and still have –100. Who is correct and why?

Which sum does the model below represent?

Which expression has the same sum as the one below?

Ahmed is riding the elevator in a building. The building has floors above and below ground level. Ahmed uses the expression below to describe his movement.Which statement could describe Ahmed’s movement?

A meteorologist used the expression below to describe how the temperature changed. Which statement could describe how the temperature changed?

Morena, a scuba diver, used the expression below to describe her position in relation to sea level.Which statement could describe the diver’s movements?

Carlos is using a number line to add another integer to –4. He begins by showing –4 on the number line, as shown below. Carlos adds the other integer on the number line and says that the sum is negative.Which is true of the number Carlos added to –4?

Indira is using a number line to add . She begins by showing –1 on the number line, as shown below.What is the sum of ?

Sebastian was in a hotel lobby and took the elevator up 7 floors to his room. Then he took the elevator down 9 floors to the parking garage. He described his movement with the expression below.What is Sebastian’s error?

Which addition does the model below represent?