Question

timed problem
score: 0/3 current time: 1.6
-1 - 2
answer
-3 -4 -2 -1

Explanation:

Step1: Analyze the operation

We need to calculate $-1 - 2$. Subtracting a number is the same as adding its opposite, so $-1 - 2 = -1 + (-2)$.

Step2: Add the negative numbers

When adding two negative numbers, we add their absolute values and keep the negative sign. The absolute value of $-1$ is $1$, and the absolute value of $-2$ is $2$. So $1 + 2 = 3$, and with the negative sign, we get $-3$.

Answer:

A. $-3$ (assuming the first option is labeled A, with the text "$-3$")