Solve $4\frac{2}{3} + 3\frac{1}{2} - 1\frac{2}{3} = x$
Aptitude
Decimal Fraction
Difficulty: Easy
Choose an option
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A$2\frac{1}{5}$
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B$2\frac{5}{3}$
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C$1\frac{3}{4}$
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D$1\frac{1}{2}$
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E$6\frac{1}{2}$
Answer
Correct Answer: $6\frac{1}{2}$
Explanation
Concept & Strategy
When adding or subtracting mixed fractions, process the integer components and the fractional components independently. Always look for canceling terms before calculating common denominators.
$$A\frac{b}{c} + X\frac{y}{z} = (A + X) + \left(\frac{b}{c} + \frac{y}{z}\right)$$
Step-by-Step Solution
* Separate the whole numbers and fractions from the equation:
$$(4 + 3 - 1) + \left(\frac{2}{3} + \frac{1}{2} - \frac{2}{3}\right)$$
* Calculate the integer sum:
$$4 + 3 - 1 = 6$$
* Evaluate the fractions. Notice that $+\frac{2}{3}$ and $-\frac{2}{3}$ perfectly cancel each other out:
$$\frac{2}{3} - \frac{2}{3} + \frac{1}{2} = \frac{1}{2}$$
* Recombine the integer and fractional parts:
$$6 + \frac{1}{2} = 6\frac{1}{2}$$
Exam Strategy & Shortcut
Do not convert to improper fractions! By visually scanning the equation $4\frac{2}{3} + 3\frac{1}{2} - 1\frac{2}{3}$, you can instantly see the $\frac{2}{3}$ fractions cancel out. The math reduces to $4 + 3\frac{1}{2} - 1$, which can be done mentally in under 5 seconds to get $6\frac{1}{2}$.
Common Pitfall
The most common mistake is rigidly converting all mixed numbers to improper fractions (e.g., $\frac{14}{3} + \frac{7}{2} - \frac{5}{3}$). This forces you to find an LCM of 6, creating large numerators and wasting valuable exam time on unnecessary arithmetic.
Final Answer
Therefore, the correct answer is **$6\frac{1}{2}$**.