Final answer:
To subtract -4.3 from -5.5, change the sign of -4.3 and then add it to -5.5 to get the result -1.2.
Step-by-step explanation:
To subtract -4.3 from -5.5, we change the sign of -4.3 to +4.3:
Then, we add -5.5 and +4.3:
Therefore, -4.3 - (-5.5) = -1.2.