Subtract: 9/10 - 2/5

Rationale

Subtracting 9/10 - 2/5 results in 1/2.

To solve the subtraction, we first convert 2/5 to a fraction with a denominator of 10, which gives us 4/10. Thus, 9/10 - 4/10 equals 5/10, which simplifies to 1/2.

A (1/2) CORRECT

This choice is the correct answer as it represents the simplified result of the subtraction. After converting 2/5 to 4/10 and performing the operation (9/10 - 4/10), we arrive at 5/10, which simplifies to 1/2.

B (3/10) YOUR ANSWER

This choice is incorrect because it does not accurately reflect the result of the subtraction. The calculation yields 5/10, which simplifies to 1/2, not 3/10. This option may stem from an incorrect subtraction or miscalculation.

C (4/10) YOUR ANSWER

This choice is also incorrect as it does not represent the final answer. While 4/10 is the equivalent of 2/5, the result of the subtraction (9/10 - 4/10) is actually 5/10, which simplifies to 1/2.

D (1/4) YOUR ANSWER

This choice is incorrect as well. The fraction 1/4 does not relate to the result of the subtraction performed. The correct result after performing the calculation is 5/10 (or 1/2), making 1/4 an unrelated option.

Conclusion

The subtraction of 9/10 - 2/5 simplifies to 1/2 after converting to a common denominator and performing the operation. The other options fail to represent the correct result, highlighting the importance of accurate fraction conversion and simplification in arithmetic operations.

Subtract: 9/10 - 2/5

Subtracting 9/10 - 2/5 results in 1/2.

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