Answer :

To solve the subtraction problem [tex]\(8.791 - 1.64\)[/tex], you follow these steps:

1. Align the Numbers Vertically by the Decimal Points: Make sure each number is lined up so that the decimal points are in the same vertical column. This helps ensure that the place values (tenths, hundredths, etc.) are correctly aligned.

```
8.791
- 1.640
```

Note that you can add an extra zero to the end of 1.64 to make it 1.640 if it helps you to keep the columns neat.

2. Subtract Column by Column Starting from the Rightmost Digit:

- Hundredths place: Subtract 0 from 1, which gives you 1.
- Tenths place: Subtract 4 from 9, which gives you 5.
- Units place: Subtract 1 from 8, which gives you 7.

3. Final Result: The answer to [tex]\(8.791 - 1.64\)[/tex] is 7.151.

That's how you get the result of 7.151 when you perform the subtraction.