The sum of the expression \( 1 + (-418) + (-418) + (-418) + 1672 \) is calculated as follows:

1. Add \( 1 + (-418) = -417 \).
2. Add the next \( -418 \) to the result: \( -417 + (-418) = -835 \).
3. Add the next \( -418 \) to the result: \( -835 + (-418) = -1253 \).
4. Finally, add \( 1672 \) to the result: \( -1253 + 1672 = 419 \).

So, the final sum is:

\[
\boxed{419}
\]

Would you like more details or have any questions?

Here are five related questions you might find interesting:

1. What is the sum of \( 5 + (-120) + (-380) + 500 \)?
2. How do you handle addition when combining positive and negative numbers?
3. What is the importance of parentheses in arithmetic operations?
4. How does the commutative property of addition help simplify calculations?
5. What is the sum of a series of negative numbers followed by a larger positive number?

**Tip:** Always perform arithmetic operations step by step, especially when combining positive and negative numbers, to avoid errors.

Learn how to calculate the sum of 1 + (-418) + (-418) + (-418) + 1672 step-by-step. This problem involves arithmetic operations with integers, including addition and subtraction. Suitable for students in Grades 5-7.

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