1. Find the sum by grouping positive and negative numbers: (-8) + (+4) + (-5) + (+10) = ___.
2. Which expression correctly shows the first step of grouping numbers by their signs to find the sum of 12 + (-5) + (-10) + 3?
3. Calculate the sum: 6 + (-11) + (-4) + 9 + (-2) = ___.
4. What is the sum of (-12) + (+4) + (-3) + (+5)?
5. Find the sum: 3.5 + (-5) + (-1.5) + 8 = ___.
6. Calculate the sum: $(-12) + (-5) = \_\_\_$.
7. Which expression results in a negative value?
8. Find the value of $15 + (-22) = \_\_\_$.
9. A team gained 8 yards on one play and then lost 11 yards on the next. What is the team's total change in yards over the two plays?
10. The temperature was $-4$ degrees in the morning. By noon, it had risen by 15 degrees. What was the temperature at noon? The temperature was \_\_\_ degrees.