Evaluate (2.5 × 3.42) + 1.2 and report the final result correctly.

Question

G1 Physics · Accepted Answer

First multiply: 2.5 × 3.42 = 8.55. The multiplication is limited to 2 significant figures, but keep guard digits until the end. Then 8.55 + 1.2 = 9.75. Addition is limited to 1 decimal place, giving 9.8.