Final answer:
The value of the expression 8.225 – 7.91 is 0.315, after performing the subtraction while aligning the decimal points correctly. Option A is correct.
Step-by-step explanation:
To find the value of the expression 8.225 – 7.91, you can perform subtraction by aligning the decimal points and subtracting as if dealing with whole numbers. Keep in mnd to borrow from the next left digit when necessary:
8.225
- 7.91
______
0.315
Since we are not adding any more decimal places, we do not need to consider additional significant figures. Therefore, the correct answer, rounded to two decimal places (which is all that is needed here since the number has only two decimal places after the subtraction), is 0.315.
We need to find the value of the expression 8.225 - 7.91.
To do this, we subtract 7.91 from 8.225: 8.225 - 7.91 = 0.315.
Therefore, the value of the expression 8.225 - 7.91 is 0.315, which corresponds to option A.