1. **State the problem:** Find the sum of $-1.4 + 2.2$. 2. **Recall the rule for adding positive and negative numbers:** When adding a negative and a positive number, subtract the smaller absolute value from the larger absolute value and take the sign of the number with the larger absolute value. 3. **Calculate the absolute values:** - $|-1.4| = 1.4$ - $|2.2| = 2.2$ 4. **Subtract the smaller absolute value from the larger:** $$2.2 - 1.4 = 0.8$$ 5. **Determine the sign:** Since $2.2$ is positive and has the larger absolute value, the result is positive. 6. **Final answer:** $$-1.4 + 2.2 = 0.8$$