Simplify: (21/2 + 3.6) - 1.9

Question

Simplify: (21/2 + 3.6) - 1.9

1. A. 4.2 (Correct answer)
2. B. 5.2
3. C. 6.2
4. D. 7.2

Correct Answer

Option A — 4.2

Detailed Solution & Explanation

The correct answer is 4.2.

Key Points

• Rewrite the mixed number: $2\tfrac{1}{2} = 2.5$.
• Then $(2.5 + 3.6) - 1.9 = 6.1 - 1.9 = 4.2$.
• Convert every mixed number/fraction to a decimal before combining, and work strictly left to right inside the brackets — the distractors (5.2, 6.2, 7.2) are what you get by mishandling the 1.9 subtraction.