Subtraction Across Zero practice worksheet for 3-digit numbers.

Problem: Solve the subtraction problems listed in the image, focusing on "Subtraction Across Zero."

The problems are:
1. \( 108 - 45 \)
2. \( 210 - 100 \)
3. \( 800 - 562 \)
4. \( 502 - 378 \)
5. \( 830 - 627 \)
6. \( 400 - 38 \)
7. \( 701 - 372 \)
8. \( 650 - 464 \)

Solution:

#### 1. \( 108 - 45 \)
- Subtract digit by digit:
- Ones place: \( 8 - 5 = 3 \)
- Tens place: \( 0 - 4 \). Since we cannot subtract 4 from 0, we borrow 1 from the hundreds place.
- The hundreds place becomes \( 1 - 1 = 0 \).
- The tens place becomes \( 10 - 4 = 6 \).
- Hundreds place: \( 0 \) (no further borrowing needed).

Result: \( 108 - 45 = 63 \)

#### 2. \( 210 - 100 \)
- Subtract digit by digit:
- Ones place: \( 0 - 0 = 0 \)
- Tens place: \( 1 - 0 = 1 \)
- Hundreds place: \( 2 - 1 = 1 \)

Result: \( 210 - 100 = 110 \)

#### 3. \( 800 - 562 \)
- Subtract digit by digit:
- Ones place: \( 0 - 2 \). Since we cannot subtract 2 from 0, we borrow 1 from the tens place.
- The tens place becomes \( 0 - 1 = -1 \) (but we need to borrow again).
- The hundreds place becomes \( 8 - 1 = 7 \).
- The tens place becomes \( 10 - 6 = 4 \).
- The ones place becomes \( 10 - 2 = 8 \).

Result: \( 800 - 562 = 238 \)

#### 4. \( 502 - 378 \)
- Subtract digit by digit:
- Ones place: \( 2 - 8 \). Since we cannot subtract 8 from 2, we borrow 1 from the tens place.
- The tens place becomes \( 0 - 1 = -1 \) (but we need to borrow again).
- The hundreds place becomes \( 5 - 1 = 4 \).
- The tens place becomes \( 10 - 7 = 3 \).
- The ones place becomes \( 12 - 8 = 4 \).

Result: \( 502 - 378 = 124 \)

#### 5. \( 830 - 627 \)
- Subtract digit by digit:
- Ones place: \( 0 - 7 \). Since we cannot subtract 7 from 0, we borrow 1 from the tens place.
- The tens place becomes \( 3 - 1 = 2 \).
- The ones place becomes \( 10 - 7 = 3 \).
- Tens place: \( 2 - 2 = 0 \).
- Hundreds place: \( 8 - 6 = 2 \).

Result: \( 830 - 627 = 203 \)

#### 6. \( 400 - 38 \)
- Subtract digit by digit:
- Ones place: \( 0 - 8 \). Since we cannot subtract 8 from 0, we borrow 1 from the tens place.
- The tens place becomes \( 0 - 1 = -1 \) (but we need to borrow again).
- The hundreds place becomes \( 4 - 1 = 3 \).
- The tens place becomes \( 10 - 3 = 7 \).
- The ones place becomes \( 10 - 8 = 2 \).

Result: \( 400 - 38 = 362 \)

#### 7. \( 701 - 372 \)
- Subtract digit by digit:
- Ones place: \( 1 - 2 \). Since we cannot subtract 2 from 1, we borrow 1 from the tens place.
- The tens place becomes \( 0 - 1 = -1 \) (but we need to borrow again).
- The hundreds place becomes \( 7 - 1 = 6 \).
- The tens place becomes \( 10 - 7 = 3 \).
- The ones place becomes \( 11 - 2 = 9 \).

Result: \( 701 - 372 = 329 \)

#### 8. \( 650 - 464 \)
- Subtract digit by digit:
- Ones place: \( 0 - 4 \). Since we cannot subtract 4 from 0, we borrow 1 from the tens place.
- The tens place becomes \( 5 - 1 = 4 \).
- The ones place becomes \( 10 - 4 = 6 \).
- Tens place: \( 4 - 6 \). Since we cannot subtract 6 from 4, we borrow 1 from the hundreds place.
- The hundreds place becomes \( 6 - 1 = 5 \).
- The tens place becomes \( 14 - 6 = 8 \).
- Hundreds place: \( 5 - 4 = 1 \).

Result: \( 650 - 464 = 186 \)

Final Answers:

\[
\boxed{
\begin{aligned}
1) & \ 63 \\
2) & \ 110 \\
3) & \ 238 \\
4) & \ 124 \\
5) & \ 203 \\
6) & \ 362 \\
7) & \ 329 \\
8) & \ 186
\end{aligned}
}
\]