Subtraction practice using the column method with six problems.

Let’s solve each subtraction problem step by step using the column method. We’ll line up the numbers by place value (ones, tens, hundreds, etc.) and subtract from right to left. If a digit on top is smaller than the one below, we borrow from the next column to the left.

---

Problem 1: 59,892 – 44,821

Line them up:

```
59,892
– 44,821
--------
```

Start from the right:

- Ones: 2 – 1 = 1
- Tens: 9 – 2 = 7
- Hundreds: 8 – 8 = 0
- Thousands: 9 – 4 = 5
- Ten thousands: 5 – 4 = 1

→ 15,071

Check: 44,821 + 15,071 = 59,892 ✔

---

Problem 2: 78,825 – 12,504

```
78,825
– 12,504
--------
```

- Ones: 5 – 4 = 1
- Tens: 2 – 0 = 2
- Hundreds: 8 – 5 = 3
- Thousands: 8 – 2 = 6
- Ten thousands: 7 – 1 = 6

→ 66,321

Check: 12,504 + 66,321 = 78,825 ✔

---

Problem 3: 671,937 – 512,382

```
671,937
– 512,382
---------
```

- Ones: 7 – 2 = 5
- Tens: 3 – 8 → can’t do! Borrow from hundreds.
- Hundreds becomes 8 (was 9), tens become 13.
- 13 – 8 = 5
- Hundreds: 8 – 3 = 5
- Thousands: 1 – 2 → can’t do! Borrow from ten thousands.
- Ten thousands was 7 → becomes 6; thousands become 11.
- 11 – 2 = 9
- Ten thousands: 6 – 1 = 5
- Hundred thousands: 6 – 5 = 1

→ 159,555

Check: 512,382 + 159,555 = 671,937 ✔

---

Problem 4: 81,845 – 5,362

Note: The second number has fewer digits. Line it up to the right:

```
81,845
– 5,362
--------
```

Think of 5,362 as 05,362.

- Ones: 5 – 2 = 3
- Tens: 4 – 6 → can’t do! Borrow from hundreds.
- Hundreds: 8 → 7; tens: 14 – 6 = 8
- Hundreds: 7 – 3 = 4
- Thousands: 1 – 5 → can’t do! Borrow from ten thousands.
- Ten thousands: 8 → 7; thousands: 11 – 5 = 6
- Ten thousands: 7 – 0 = 7

→ 76,483

Check: 5,362 + 76,483 = 81,845 ✔

---

Problem 5: 999,999 – 289,370

```
999,999
– 289,370
---------
```

No borrowing needed here — every top digit is bigger or equal.

- Ones: 9 – 0 = 9
- Tens: 9 – 7 = 2
- Hundreds: 9 – 3 = 6
- Thousands: 9 – 9 = 0
- Ten thousands: 9 – 8 = 1
- Hundred thousands: 9 – 2 = 7

→ 710,629

Check: 289,370 + 710,629 = 999,999 ✔

---

Problem 6: 103,382 – 99,372

```
103,382
– 99,372
---------
```

Align properly:

- Ones: 2 – 2 = 0
- Tens: 8 – 7 = 1
- Hundreds: 3 – 3 = 0
- Thousands: 3 – 9 → can’t do! Need to borrow.
- But ten thousands is 0 → so go to hundred thousands.
- Hundred thousands: 1 → 0
- Ten thousands: 0 → 10, but we need to lend to thousands → so ten thousands becomes 9, thousands becomes 13.
- Now: 13 – 9 = 4
- Ten thousands: 9 – 9 = 0
- Hundred thousands: 0 – 0 = 0 (we don’t write leading zero)

So result is: 4,010

Wait — let’s double-check that borrowing carefully.

Original:

```
103,382
– 99,372
---------
```

Breakdown:

Hundred thousands | Ten thousands | Thousands | Hundreds | Tens | Ones
1 | 0 | 3 | 3 | 8 | 2
minus
0 | 9 | 9 | 3 | 7 | 2

We start from right:

Ones: 2–2=0
Tens: 8–7=1
Hundreds: 3–3=0
Thousands: 3–9 → need to borrow. Look at ten thousands: it’s 0 → can’t borrow directly. So go to hundred thousands: 1 becomes 0. Then ten thousands becomes 10. But we need to lend 1 to thousands, so ten thousands becomes 9, and thousands becomes 13.

Now: 13 – 9 = 4
Ten thousands: 9 – 9 = 0
Hundred thousands: 0 – 0 = 0 → ignore leading zero.

So answer is: 4,010

But wait — 99,372 + 4,010 = 103,382? Let’s check:

99,372 + 4,000 = 103,372
+10 = 103,382 → YES!

✔ Correct.

---

Final Answers:

1. 15,071
2. 66,321
3. 159,555
4. 76,483
5. 710,629
6. 4,010

──────────────────────────────────────

Final Answer:
1. 15,071
2. 66,321
3. 159,555
4. 76,483
5. 710,629
6. 4,010