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Applying the same-sign rule:
- $$ 1 + 4 = 5 $$: One positive counter combined with four more positive counters gives five positives.
- $$ -1 + (-4) = -5 $$: One negative counter combined with four more negative counters gives five negatives.

In both cases the addends share the same sign, so their absolute values ($$ 1 $$ and $$ 4 $$) are added to get $$ 5 $$, and the common sign is attached to the result.

Adding $$ 1 + 4 $$ and $$ -1 + (-4) $$

Arrange the steps in the correct order to add $$-1 + (-4)$$ using the same-sign addition rule.

What is the result of adding $$-1 + (-4)$$ using the same-sign addition rule?

What is the sum of $$-1$$ and $$-4$$?

Question:
According to the same-sign addition rule, what is the sum of $$-1$$ and $$-4$$?

Sample answer:
$$-5$$

Key points:
- Add the absolute values of the numbers.
- Attach the common sign to the result.

Feedback:
Because both numbers are negative, add their absolute values ($$1 + 4 = 5$$) and attach the common negative sign to get $$-5$$.

According to the same-sign addition rule, what is the sum of $$-1$$ and $$-4$$?

Match each addition expression or rule component with its correct result or description based on the same-sign rule.

Calculate $$-1 + (-4)$$.

Case context:
A: $$1+4$$ B: $$-1+(-4)$$

Question:
Find each sum. Explain the same-sign rule.

Sample answer:
Add the absolute values: $$1+4=5$$. Keep the common sign. A is $$5$$, and B is $$-5$$.

Key points:
- Add the absolute values.
- Keep the common sign.
- A: $$5$$
- B: $$-5$$

Rubric:
The response gives $$5$$ and $$-5$$ and explains that absolute values are added and the common sign is kept.

Find each sum. Explain the same-sign rule.

Question:
State the rule for adding integers with the same sign. Then solve $$1+4$$ and $$-1+(-4)$$.

Sample answer:
Add the absolute values and keep the common sign. Therefore, $$1+4=5$$ and $$-1+(-4)=-5$$.

Key points:
- Add the absolute values.
- Keep the common sign.
- $$1+4=5$$
- $$-1+(-4)=-5$$

Rubric:
The response states the same-sign rule and correctly solves both sums.

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