42.58-7.577=

42.58-7.577=
a. 35.003
b. 35.523
c. 36.523
d. 50.157

The correct answer and explanation is:

The correct answer is b. 35.523.

Explanation:

To solve this subtraction problem, we align the decimal points and subtract the numbers digit by digit, starting from the rightmost digit. Here’s how to break it down:

1. Write the numbers in column format:

  42.580
-  7.577
---------

Note that we’ve added an extra zero to 42.58 to make the decimal places consistent.

2. Start with the thousandths place:
   • In the thousandths place, 0 minus 7 requires us to borrow. So, we borrow 1 from the hundredths place (making it 7) and add 10 to the thousandths place.
   • Now, we have 10 – 7 = 3.
3. Move to the hundredths place:
   • After borrowing, the hundredths place is 7 (previously 8), and we subtract 7 from 7. This gives 0.
4. Move to the tenths place:
   • In the tenths place, 5 minus 5 equals 0.
5. Finally, subtract the whole numbers:
   • In the units place, 42 minus 7 equals 35.

So, putting it all together, the result is:

  42.580
-  7.577
---------
  35.523

Therefore, the correct result of 42.58 minus 7.577 is 35.523, which corresponds to option b.