Math worksheet for practicing addition and subtraction of two-digit numbers without regrouping.

Let’s solve each problem one by one. Remember, we’re adding or subtracting 3-digit numbers without regrouping — that means in every column (ones, tens, hundreds), the digits will add up to less than 10 or subtract without needing to borrow.

---

First Row: Addition

Problem 1: 704 + 152

- Ones: 4 + 2 = 6
- Tens: 0 + 5 = 5
- Hundreds: 7 + 1 = 8
→ Answer: 856

Problem 2: 619 + 150

- Ones: 9 + 0 = 9
- Tens: 1 + 5 = 6
- Hundreds: 6 + 1 = 7
→ Answer: 769

Problem 3: 420 + 149

- Ones: 0 + 9 = 9
- Tens: 2 + 4 = 6
- Hundreds: 4 + 1 = 5
→ Answer: 569

Problem 4: 663 + 223

- Ones: 3 + 3 = 6
- Tens: 6 + 2 = 8
- Hundreds: 6 + 2 = 8
→ Answer: 886

---

Second Row: Addition

Problem 5: 431 + 217

- Ones: 1 + 7 = 8
- Tens: 3 + 1 = 4
- Hundreds: 4 + 2 = 6
→ Answer: 648

Problem 6: 184 + 801

- Ones: 4 + 1 = 5
- Tens: 8 + 0 = 8
- Hundreds: 1 + 8 = 9
→ Answer: 985

Problem 7: 126 + 671

- Ones: 6 + 1 = 7
- Tens: 2 + 7 = 9
- Hundreds: 1 + 6 = 7
→ Answer: 797

Problem 8: 517 + 311

- Ones: 7 + 1 = 8
- Tens: 1 + 1 = 2
- Hundreds: 5 + 3 = 8
→ Answer: 828

---

Third Row: Subtraction

Problem 9: 965 - 760

- Ones: 5 - 0 = 5
- Tens: 6 - 6 = 0
- Hundreds: 9 - 7 = 2
→ Answer: 205

Problem 10: 663 - 533

- Ones: 3 - 3 = 0
- Tens: 6 - 3 = 3
- Hundreds: 6 - 5 = 1
→ Answer: 130

Problem 11: 677 - 626

- Ones: 7 - 6 = 1
- Tens: 7 - 2 = 5
- Hundreds: 6 - 6 = 0 → don’t write leading zero
→ Answer: 51

Wait — let’s double-check: 677 - 626.

Hundreds: 6 - 6 = 0 → so it’s just 51? Actually, yes — because 677 minus 600 is 77, then minus 26 more is 51. Correct.

But since it’s a 3-digit subtraction and answer can be 2-digit, that’s fine.

Actually, let me recheck:

677
-626
= 051 → but we write as 51? Wait — no! In standard form, we keep all digits unless specified. But here, since it’s “without regrouping” and all columns work, we should write 051? No — typically we drop leading zeros.

But looking at other problems — for example, 965 - 760 = 205 — they kept the zero in tens place.

So for 677 - 626:

Hundreds: 6 - 6 = 0 → we still write it? Actually, in vertical format, if hundreds digit becomes 0, we usually omit it unless it’s part of a larger number.

But in this worksheet context, since all answers are expected to be written under the line, and others like 205 have 3 digits, perhaps we should write 051? That doesn’t make sense.

Wait — let’s calculate numerically: 677 - 626 = 51. So it’s two digits. But in the box, you’d write 51 aligned to the right? Or with a leading space?

Looking back at the image layout — each answer goes under the line in the same box. Since it’s math, we write the actual value.

I think it’s safe to write 51, but let’s confirm with another.

Actually, let’s do Problem 12 first.

Problem 12: 668 - 448

- Ones: 8 - 8 = 0
- Tens: 6 - 4 = 2
- Hundreds: 6 - 4 = 2
→ Answer: 220

That’s clear.

Back to Problem 11: 677 - 626.

If I do it step by step:

Start from ones: 7 - 6 = 1
Tens: 7 - 2 = 5
Hundreds: 6 - 6 = 0 → so the number is 051, which is 51.

In elementary math worksheets, when the result has fewer digits, they still write it normally — so 51 is correct.

But to match the format, maybe they expect 3 digits? Let’s see if any other problem gives a 2-digit answer.

Looking ahead:

Problem 13: 868 - 716 = ?

Ones: 8-6=2
Tens: 6-1=5
Hundreds: 8-7=1 → 152 → 3 digits.

Problem 14: 588 - 475

Ones: 8-5=3
Tens: 8-7=1
Hundreds: 5-4=1 → 113

Problem 15: 929 - 808

Ones: 9-8=1
Tens: 2-0=2
Hundreds: 9-8=1 → 121

Problem 16: 891 - 680

Ones: 1-0=1
Tens: 9-8=1
Hundreds: 8-6=2 → 211

All others give 3-digit answers except possibly Problem 11.

Wait — 677 - 626:

Let me compute: 677 minus 600 is 77, minus 26 is 51. Yes.

But in the context of "without regrouping", and since each column works independently, and hundreds column gives 0, it's acceptable to write 51.

However, to be consistent with how these worksheets usually present answers, and since the box might expect 3 digits, perhaps I made a mistake?

No — mathematically, it’s 51.

But let’s check online or think: is there a rule?

Actually, in many such worksheets, if the hundreds digit is zero, they still write the number as is — so 51.

For example, if you had 100 - 100 = 0, you write 0.

Here, 677 - 626 = 51, so we write 51.

I’ll go with 51.

But let me verify once more:

677
- 626
------
51 ← yes, because 600-600=0, 70-20=50, 7-6=1 → 51.

Okay.

---

Fourth Row: Subtraction

Problem 13: 868 - 716

- Ones: 8 - 6 = 2
- Tens: 6 - 1 = 5
- Hundreds: 8 - 7 = 1
→ Answer: 152

Problem 14: 588 - 475

- Ones: 8 - 5 = 3
- Tens: 8 - 7 = 1
- Hundreds: 5 - 4 = 1
→ Answer: 113

Problem 15: 929 - 808

- Ones: 9 - 8 = 1
- Tens: 2 - 0 = 2
- Hundreds: 9 - 8 = 1
→ Answer: 121

Problem 16: 891 - 680

- Ones: 1 - 0 = 1
- Tens: 9 - 8 = 1
- Hundreds: 8 - 6 = 2
→ Answer: 211

---

Now, compiling all answers in order:

Row 1: 856, 769, 569, 886
Row 2: 648, 985, 797, 828
Row 3: 205, 130, 51, 220
Row 4: 152, 113, 121, 211

Wait — for Problem 11, I said 51, but let me confirm if it should be written as 051? Probably not. In the answer key, it would be 51.

But to be thorough, let’s see if the problem allows it — since it says “without regrouping”, and no borrowing needed, and 6-6=0 in hundreds, it’s fine.

Perhaps the worksheet expects 3-digit answers always? But 51 is correct.

Another way: maybe I miscalculated.

677 - 626:

Subtract hundreds: 600 - 600 = 0
Tens: 70 - 20 = 50
Ones: 7 - 6 = 1
Total: 0 + 50 + 1 = 51.

Yes.

I think it’s correct.

Final list:

1. 856
2. 769
3. 569
4. 886
5. 648
6. 985
7. 797
8. 828
9. 205
10. 130
11. 51
12. 220
13. 152
14. 113
15. 121
16. 211

But for consistency, perhaps in the context, they want all answers as 3-digit? Let me check Problem 10: 663 - 533 = 130 — that’s 3 digits.

Problem 11 is the only one that might be 2-digit.

Perhaps I should write it as 051? But that’s not standard.

Looking at the image again mentally — the boxes are sized for 3 digits, but mathematically, 51 is correct.

I recall that in some systems, they pad with leading zeros, but I doubt it.

To resolve this, let’s assume the answer is 51, as per calculation.

But let me do a quick search in my mind: similar worksheets — usually, they accept the numerical value.

So I'll stick with 51.

Now, for the final answer, since the user wants the solutions, I need to provide them in order.

The problems are arranged in 4 rows of 4, so I'll list them row by row.

Final Answer:
856, 769, 569, 886, 648, 985, 797, 828, 205, 130, 51, 220, 152, 113, 121, 211

But to present it clearly, perhaps as a list matching the grid.

Since the instruction is to provide the final answer after reasoning, and it's multiple problems, I'll list them in order.

I think that's fine.