Question 61

1/2

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

A) 1/2

This is the correct answer because after subtracting 4/10 from 9/10, we accurately arrive at 5/10, which simplifies to 1/2.

B) 3/10

Option B is incorrect because subtracting 2/5 (which is equivalent to 4/10) from 9/10 does not yield 3/10. The correct calculation results in 5/10.

C) 4/10

Option C is also incorrect as it misrepresents the outcome of the subtraction. The correct subtraction of 9/10 - 4/10 leads to 5/10, not 4/10.

D) 1/4

Option D is incorrect as well, since 1/4 is not equal to the result of the subtraction. The proper calculation shows that we get 1/2, which is not equivalent to 1/4.

Conclusion

The correct answer is 1/2, derived from the precise calculation of 9/10 - 4/10. All other options fail to represent the accurate result of this operation, demonstrating a misunderstanding of fraction subtraction.