Column Subtraction Worksheet - Solve 12 three-digit subtraction equations.

The task involves solving column subtraction problems. Below is the step-by-step solution for each problem:

---

Problem 1:

$$
494 - 315 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 4 - 5 \). Since 4 is less than 5, borrow 1 from the tens place (9 becomes 8).
$$
14 - 5 = 9
$$
2. Subtract the tens place: \( 8 - 1 = 7 \).
3. Subtract the hundreds place: \( 4 - 3 = 1 \).

So,
$$
494 - 315 = 179
$$

---

Problem 2:

$$
567 - 328 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 7 - 8 \). Since 7 is less than 8, borrow 1 from the tens place (6 becomes 5).
$$
17 - 8 = 9
$$
2. Subtract the tens place: \( 5 - 2 = 3 \).
3. Subtract the hundreds place: \( 5 - 3 = 2 \).

So,
$$
567 - 328 = 239
$$

---

Problem 3:

$$
952 - 648 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 2 - 8 \). Since 2 is less than 8, borrow 1 from the tens place (5 becomes 4).
$$
12 - 8 = 4
$$
2. Subtract the tens place: \( 4 - 4 = 0 \).
3. Subtract the hundreds place: \( 9 - 6 = 3 \).

So,
$$
952 - 648 = 304
$$

---

Problem 4:

$$
345 - 256 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 5 - 6 \). Since 5 is less than 6, borrow 1 from the tens place (4 becomes 3).
$$
15 - 6 = 9
$$
2. Subtract the tens place: \( 3 - 5 \). Since 3 is less than 5, borrow 1 from the hundreds place (3 becomes 2).
$$
13 - 5 = 8
$$
3. Subtract the hundreds place: \( 2 - 2 = 0 \).

So,
$$
345 - 256 = 89
$$

---

Problem 5:

$$
792 - 537 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 2 - 7 \). Since 2 is less than 7, borrow 1 from the tens place (9 becomes 8).
$$
12 - 7 = 5
$$
2. Subtract the tens place: \( 8 - 3 = 5 \).
3. Subtract the hundreds place: \( 7 - 5 = 2 \).

So,
$$
792 - 537 = 255
$$

---

Problem 6:

$$
922 - 462 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 2 - 2 = 0 \).
2. Subtract the tens place: \( 2 - 6 \). Since 2 is less than 6, borrow 1 from the hundreds place (9 becomes 8).
$$
12 - 6 = 6
$$
3. Subtract the hundreds place: \( 8 - 4 = 4 \).

So,
$$
922 - 462 = 460
$$

---

Problem 7:

$$
853 - 342 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 3 - 2 = 1 \).
2. Subtract the tens place: \( 5 - 4 = 1 \).
3. Subtract the hundreds place: \( 8 - 3 = 5 \).

So,
$$
853 - 342 = 511
$$

---

Problem 8:

$$
719 - 462 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 9 - 2 = 7 \).
2. Subtract the tens place: \( 1 - 6 \). Since 1 is less than 6, borrow 1 from the hundreds place (7 becomes 6).
$$
11 - 6 = 5
$$
3. Subtract the hundreds place: \( 6 - 4 = 2 \).

So,
$$
719 - 462 = 257
$$

---

Problem 9:

$$
503 - 224 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 3 - 4 \). Since 3 is less than 4, borrow 1 from the tens place (0 becomes 9).
$$
13 - 4 = 9
$$
2. Subtract the tens place: \( 9 - 2 = 7 \).
3. Subtract the hundreds place: \( 5 - 2 = 3 \).

So,
$$
503 - 224 = 279
$$

---

Problem 10:

$$
685 - 473 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 5 - 3 = 2 \).
2. Subtract the tens place: \( 8 - 7 = 1 \).
3. Subtract the hundreds place: \( 6 - 4 = 2 \).

So,
$$
685 - 473 = 212
$$

---

Problem 11:

$$
956 - 728 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 6 - 8 \). Since 6 is less than 8, borrow 1 from the tens place (5 becomes 4).
$$
16 - 8 = 8
$$
2. Subtract the tens place: \( 4 - 2 = 2 \).
3. Subtract the hundreds place: \( 9 - 7 = 2 \).

So,
$$
956 - 728 = 228
$$

---

Problem 12:

$$
637 - 408 = \, ?
$$

#### Step-by-Step Solution:
1. Subtract the ones place: \( 7 - 8 \). Since 7 is less than 8, borrow 1 from the tens place (3 becomes 2).
$$
17 - 8 = 9
$$
2. Subtract the tens place: \( 2 - 0 = 2 \).
3. Subtract the hundreds place: \( 6 - 4 = 2 \).

So,
$$
637 - 408 = 229
$$

---

Final Answers:

$$
\boxed{
\begin{aligned}
1. & \, 179 \\
2. & \, 239 \\
3. & \, 304 \\
4. & \, 89 \\
5. & \, 255 \\
6. & \, 460 \\
7. & \, 511 \\
8. & \, 257 \\
9. & \, 279 \\
10. & \, 212 \\
11. & \, 228 \\
12. & \, 229 \\
\end{aligned}
}
$$