Question 1: Calculate the value of 3 - (-5).

Answer: 8

Question 2: Evaluate: -4 + 7.

Answer: 3

Question 3: Simplify: - (2 - 6).

Answer: 4

Question 4: Calculate: -3 × (-4).

Answer: 12

Question 5: Substitute x = -2 into the expression y = 5x + 3. Find y.

Answer: -7

Question 6: Evaluate: - (8 ÷ -2).

Answer: 4

Question 7: Compute: - (-3) + (-5).

Answer: -2

Question 8: If x = -4 and y = -3, evaluate the expression 2x - y.

Answer: -5

Question 9: Construct a triangle on the grid where side AB = -3 units and side AC = 5 units. Describe your construction process.

Answer: Student describes placing points so that the length of side AB is 3 units in the negative x-direction and side AC is 5 units in a positive direction, ensuring correct sign considerations.

Question 10: A car accelerates negatively at -2 m/s² over 5 seconds. What is its change in velocity?

Answer: -10 m/s

Question 11: A temperature drops by -3°C each hour. After 4 hours, how much has the temperature changed?

Answer: -12°C

Question 12: Identify and correct the mistake in this calculation: - (2 + 3) = -2 + -3.

Answer: Incorrect. The correct calculation is - (2 + 3) = -5. The mistake is treating the signs as independent without considering the effect of the subtraction.