Final answer:
To calculate the expression 4 + -2 - 3, we first add 4 and -2 to get 2. Then we subtract 3 from 2, which results in -1.
Step-by-step explanation:
The question involves adding and subtracting integers. The given expression to evaluate is 4 + -2 - 3. To solve this, first, we combine 4 and -2, which are next to each other. According to the rule when two numbers having opposite signs are added, we subtract the smaller number from the larger number, keeping the sign of the larger number. So, 4 + (-2) = 4 - 2 = 2. Now we have a simpler expression: 2 - 3. Again, we follow the rule for subtracting, which is essentially addition after changing the sign of the number being subtracted. We change the sign of -3 to get 2 + 3 = 5, and since 2 and 3 have opposite signs, we subtract again, keeping the sign of the larger number, which gives us -1.