Question 9 • Mathematics 8
The substitution and multiplications are correct: 3.57 × 0.5 = 1.785 and 2.63 × 0.5 = 1.315. The left side evaluates to 1.785 + 1.61 = 3.395, and the right side should be 4.71 − 1.315 = 3.395, not 6.025. Tre’s error is in the arithmetic when adding or subtracting, so the correct choice is D, “Tre made an error when adding or subtracting.”
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