ADDITION WORKSHEETS - 3 DIGITS - Free Printable

Problem Description:

The task involves solving 12 three-digit addition problems. Each problem consists of two three-digit numbers that need to be added together. The goal is to compute the sum for each pair of numbers.

Solution Approach:

We will solve each addition problem step by step, ensuring clarity and accuracy. Let's go through each problem one by one.

---

#### Problem [1]:
$$
227 + 445
$$
- Add the units place: \(7 + 5 = 12\). Write down 2 and carry over 1.
- Add the tens place: \(2 + 4 + 1 = 7\).
- Add the hundreds place: \(2 + 4 = 6\).

$$
227 + 445 = 672
$$

---

#### Problem [2]:
$$
198 + 360
$$
- Add the units place: \(8 + 0 = 8\).
- Add the tens place: \(9 + 6 = 15\). Write down 5 and carry over 1.
- Add the hundreds place: \(1 + 3 + 1 = 5\).

$$
198 + 360 = 558
$$

---

#### Problem [3]:
$$
212 + 404
$$
- Add the units place: \(2 + 4 = 6\).
- Add the tens place: \(1 + 0 = 1\).
- Add the hundreds place: \(2 + 4 = 6\).

$$
212 + 404 = 616
$$

---

#### Problem [4]:
$$
149 + 226
$$
- Add the units place: \(9 + 6 = 15\). Write down 5 and carry over 1.
- Add the tens place: \(4 + 2 + 1 = 7\).
- Add the hundreds place: \(1 + 2 = 3\).

$$
149 + 226 = 375
$$

---

#### Problem [5]:
$$
253 + 150
$$
- Add the units place: \(3 + 0 = 3\).
- Add the tens place: \(5 + 5 = 10\). Write down 0 and carry over 1.
- Add the hundreds place: \(2 + 1 + 1 = 4\).

$$
253 + 150 = 403
$$

---

#### Problem [6]:
$$
358 + 461
$$
- Add the units place: \(8 + 1 = 9\).
- Add the tens place: \(5 + 6 = 11\). Write down 1 and carry over 1.
- Add the hundreds place: \(3 + 4 + 1 = 8\).

$$
358 + 461 = 819
$$

---

#### Problem [7]:
$$
376 + 396
$$
- Add the units place: \(6 + 6 = 12\). Write down 2 and carry over 1.
- Add the tens place: \(7 + 9 + 1 = 17\). Write down 7 and carry over 1.
- Add the hundreds place: \(3 + 3 + 1 = 7\).

$$
376 + 396 = 772
$$

---

#### Problem [8]:
$$
377 + 195
$$
- Add the units place: \(7 + 5 = 12\). Write down 2 and carry over 1.
- Add the tens place: \(7 + 9 + 1 = 17\). Write down 7 and carry over 1.
- Add the hundreds place: \(3 + 1 + 1 = 5\).

$$
377 + 195 = 572
$$

---

#### Problem [9]:
$$
105 + 360
$$
- Add the units place: \(5 + 0 = 5\).
- Add the tens place: \(0 + 6 = 6\).
- Add the hundreds place: \(1 + 3 = 4\).

$$
105 + 360 = 465
$$

---

#### Problem [10]:
$$
262 + 281
$$
- Add the units place: \(2 + 1 = 3\).
- Add the tens place: \(6 + 8 = 14\). Write down 4 and carry over 1.
- Add the hundreds place: \(2 + 2 + 1 = 5\).

$$
262 + 281 = 543
$$

---

#### Problem [11]:
$$
140 + 143
$$
- Add the units place: \(0 + 3 = 3\).
- Add the tens place: \(4 + 4 = 8\).
- Add the hundreds place: \(1 + 1 = 2\).

$$
140 + 143 = 283
$$

---

#### Problem [12]:
$$
436 + 458
$$
- Add the units place: \(6 + 8 = 14\). Write down 4 and carry over 1.
- Add the tens place: \(3 + 5 + 1 = 9\).
- Add the hundreds place: \(4 + 4 = 8\).

$$
436 + 458 = 894
$$

---

Final Answers:

$$
\boxed{
\begin{aligned}
[1] & : 672 \\
[2] & : 558 \\
[3] & : 616 \\
[4] & : 375 \\
[5] & : 403 \\
[6] & : 819 \\
[7] & : 772 \\
[8] & : 572 \\
[9] & : 465 \\
[10] & : 543 \\
[11] & : 283 \\
[12] & : 894
\end{aligned}
}
$$