Question

Jillian is using integer tiles to add 7 + (-2). She uses the steps below. Jillian has made an error . In which steps does it occur?

Answer 1

Step 4 is the occur.

Answer 2

Jillian has made an error in steps 4.

Explanation:

Given : Jillian is using integer tiles to add 7 + (-2).

To find : Jillian has made an error . In which steps does it occur.

Solution : We have given integer tiles to add 7 + (-2).

Step 1 : Jillian take the + 7 tiles , that is correct

Step 2 : Now , Jillian take another - 2 tile , that is also correct.

Step 3 : In this + 2 tiles cancel the -2 tile from +7 tiles.

Step 4 : Now he get 2 that is wrong because from the step 3 we get + 5 tile after canceling + 2 tiles from + 7.

Therefore, Jillian has made an error in steps 4.