Decimal addition practice worksheet for students.

Problem: Add the following decimals.

We are tasked with solving eight decimal addition problems. Let's solve each one step by step.

---

#### 1) \( 0.03 + 0.8 \)

- Align the decimal points:
```
0.03
+ 0.80
------
```

- Add the numbers:
- Hundredths place: \( 3 + 0 = 3 \)
- Tenths place: \( 0 + 8 = 8 \)
- Ones place: \( 0 + 0 = 0 \)

- Result: \( 0.83 \)

Answer: \( 0.83 \)

---

#### 2) \( 1.039 + 0.15 \)

- Align the decimal points:
```
1.039
+ 0.150
------
```

- Add the numbers:
- Thousandths place: \( 9 + 0 = 9 \)
- Hundredths place: \( 3 + 5 = 8 \)
- Tenths place: \( 0 + 1 = 1 \)
- Ones place: \( 1 + 0 = 1 \)

- Result: \( 1.189 \)

Answer: \( 1.189 \)

---

#### 3) \( 0.005 + 0.09 \)

- Align the decimal points:
```
0.005
+ 0.090
------
```

- Add the numbers:
- Thousandths place: \( 5 + 0 = 5 \)
- Hundredths place: \( 0 + 9 = 9 \)
- Tenths place: \( 0 + 0 = 0 \)
- Ones place: \( 0 + 0 = 0 \)

- Result: \( 0.095 \)

Answer: \( 0.095 \)

---

#### 4) \( 51.5 + 5.05 \)

- Align the decimal points:
```
51.50
+ 5.05
------
```

- Add the numbers:
- Hundredths place: \( 0 + 5 = 5 \)
- Tenths place: \( 5 + 0 = 5 \)
- Ones place: \( 1 + 5 = 6 \)
- Tens place: \( 5 + 0 = 5 \)

- Result: \( 56.55 \)

Answer: \( 56.55 \)

---

#### 5) \( 7.77 + 0.777 \)

- Align the decimal points:
```
7.770
+ 0.777
------
```

- Add the numbers:
- Thousandths place: \( 0 + 7 = 7 \)
- Hundredths place: \( 7 + 7 = 14 \) (carry 1 to tenths)
- Tenths place: \( 7 + 7 + 1 = 15 \) (carry 1 to ones)
- Ones place: \( 7 + 0 + 1 = 8 \)

- Result: \( 8.547 \)

Answer: \( 8.547 \)

---

#### 6) \( 16.125 + 121.25 \)

- Align the decimal points:
```
16.125
+121.250
------
```

- Add the numbers:
- Thousandths place: \( 5 + 0 = 5 \)
- Hundredths place: \( 2 + 5 = 7 \)
- Tenths place: \( 1 + 2 = 3 \)
- Ones place: \( 6 + 1 = 7 \)
- Tens place: \( 1 + 2 = 3 \)
- Hundreds place: \( 0 + 1 = 1 \)

- Result: \( 137.375 \)

Answer: \( 137.375 \)

---

#### 7) \( 25 + 0.25 \)

- Align the decimal points:
```
25.00
+ 0.25
------
```

- Add the numbers:
- Hundredths place: \( 0 + 5 = 5 \)
- Tenths place: \( 0 + 2 = 2 \)
- Ones place: \( 5 + 0 = 5 \)
- Tens place: \( 2 + 0 = 2 \)

- Result: \( 25.25 \)

Answer: \( 25.25 \)

---

#### 8) \( 180 + 0.180 \)

- Align the decimal points:
```
180.000
+ 0.180
------
```

- Add the numbers:
- Thousandths place: \( 0 + 0 = 0 \)
- Hundredths place: \( 0 + 8 = 8 \)
- Tenths place: \( 0 + 1 = 1 \)
- Ones place: \( 0 + 0 = 0 \)
- Tens place: \( 8 + 0 = 8 \)
- Hundreds place: \( 1 + 0 = 1 \)

- Result: \( 180.180 \)

Answer: \( 180.180 \)

---

Final Answers:

\[
\boxed{
\begin{aligned}
1) & \, 0.83 \\
2) & \, 1.189 \\
3) & \, 0.095 \\
4) & \, 56.55 \\
5) & \, 8.547 \\
6) & \, 137.375 \\
7) & \, 25.25 \\
8) & \, 180.180
\end{aligned}
}
\]