Worksheet for practicing addition of two-digit numbers with examples and a real-world word problem.

Let's solve each part of the worksheet step by step.

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1. Find each sum.

We are adding two numbers in each case:

a)
```
2 1
+ 7 4
-----
9 5
```

Explanation:
20 + 70 = 90, and 1 + 4 = 5 → 90 + 5 = 95

✔ Answer: 95

b)
```
4 8 3
+ 5 2 7
-------
1 0 1 0
```

Explanation:
Add column by column from right to left:

- 3 + 7 = 10 → write down 0, carry over 1
- 8 + 2 + 1 (carry) = 11 → write down 1, carry over 1
- 4 + 5 + 1 (carry) = 10 → write down 0, carry over 1
- Final carry becomes the thousands digit

So, result is 1010

✔ Answer: 1010

---

2. Find each sum.

These are all addition problems:

a)
```
1 1
+ 2 6 3
-------
2 7 4
```

→ 11 + 263 = 274

✔ Answer: 274

b)
```
1 2 2
+ 1 3 2
-------
2 5 4
```

→ 122 + 132 = 254

✔ Answer: 254

c)
```
3 4 5
+ 3 4 5
-------
6 9 0
```

→ 345 + 345 = 690

✔ Answer: 690

d)
```
8 6 3
+ 2 9 1
-------
1 1 5 4
```

→ 863 + 291 = 1154

✔ Answer: 1154

e)
```
3 0 3
+ 6 0 2
-------
9 0 5
```

→ 303 + 602 = 905

✔ Answer: 905

f)
```
3 4 3
+ 3 9 4
-------
7 3 7
```

→ 343 + 394 = 737

✔ Answer: 737

g)
```
3 9 2
+ 4 8 8
-------
8 8 0
```

→ 392 + 488 = 880

✔ Answer: 880

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3. Write the answer in the box.

a)
213 + 137 = ?

→ 213 + 137 = 350

✔ Answer: 350

b)
535 + 162 = ?

→ 535 + 162 = 697

✔ Answer: 697

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4. Write the missing number in the box.

We need to find the missing addend.

a)
```
?
+ 1 6 2
-------
2 7 8
```

So, ? = 278 - 162 = 116

✔ Answer: 116

b)
```
2 1 0
+ ?
-------
3 4 8
```

So, ? = 348 - 210 = 138

✔ Answer: 138

c)
```
2 1 1
+ ?
-------
2 4 4
```

? = 244 - 211 = 33

✔ Answer: 33

d)
```
2 1 9
+ ?
-------
2 9 7
```

? = 297 - 219 = 78

✔ Answer: 78

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5. Word Problems

#### Problem 1:
> One jar contains 204 candies, and another contains 48 candies. How many candies are there altogether?

Add:
204 + 48 = 252

✔ Answer: 252 candies

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#### Problem 2:
> A box has 156 baseball cards, and the other has 193. How many cards do they have altogether?

Add:
156 + 193 = 349

✔ Answer: 349 cards

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✔ Final Answers Summary:

1. Find each sum:
- a) 95
- b) 1010

2. Find each sum:
- a) 274
- b) 254
- c) 690
- d) 1154
- e) 905
- f) 737
- g) 880

3. Write the answer in the box:
- a) 350
- b) 697

4. Write the missing number:
- a) 116
- b) 138
- c) 33
- d) 78

5. Word problems:
- Candies: 252
- Baseball cards: 349

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Let me know if you'd like this formatted as a printable answer key!