Work out .
Answer and explanation
Correct answer: A. -9
- Step 1: Subtracting a negative is the same as adding: .
- Step 2: Adding a negative is the same as subtracting: .
Answer
-9.
Why not the others: -15: This turns into , so the double negative was not changed into an addition. 1: This turns into , but adding a negative means subtracting. -4: This stops after the first step and leaves out the .
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