Let's calculate the expression step-by-step:

\[
-12.4 + 19.1 + (-4.3)
\]

1. Combine the first two numbers:

\[
-12.4 + 19.1 = 6.7
\]

2. Now add \(-4.3\):

\[
6.7 + (-4.3) = 6.7 - 4.3 = 2.4
\]

So, the result is:

\[
2.4
\]

Would you like more details or have any questions? Here are some related questions:

1. How would you handle the addition of more negative and positive numbers?
2. How can you use a number line to visualize this calculation?
3. What is the rule for adding and subtracting negative numbers?
4. How can you apply this to solving real-world problems?
5. How would this change if you multiplied instead of added?

**Tip:** When adding or subtracting numbers, think of positive numbers as gains and negative numbers as losses.

Learn how to solve the arithmetic expression -12.4 + 19.1 + (-4.3) using the rules for adding positive and negative numbers. This step-by-step guide covers the commutative and associative properties of addition, making it perfect for students in Grades 6-8.

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