Decimal Addition Practice Worksheet with 15 Problems for Math Learning

Problem: Solve the decimal addition problems provided in the image.

#### Step-by-Step Solution:

We will solve each problem by aligning the decimal points and performing addition. Let's go through each one:

---

Problem 1:

$$
246.89 + 57.01
$$
- Align the decimals:
$$
\begin{array}{r}
246.89 \\
+ 57.01 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(9 + 1 = 10\) → Write down 0, carry 1.
- Tenths place: \(8 + 0 + 1 = 9\).
- Units place: \(6 + 7 = 13\) → Write down 3, carry 1.
- Tens place: \(4 + 5 + 1 = 10\) → Write down 0, carry 1.
- Hundreds place: \(2 + 0 + 1 = 3\).

Result:
$$
246.89 + 57.01 = 303.90
$$

---

Problem 2:

$$
7.6 + 891.36
$$
- Align the decimals:
$$
\begin{array}{r}
7.60 \\
+ 891.36 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(0 + 6 = 6\).
- Tenths place: \(6 + 3 = 9\).
- Units place: \(7 + 1 = 8\).
- Tens place: \(0 + 9 = 9\).
- Hundreds place: \(0 + 8 = 8\).

Result:
$$
7.6 + 891.36 = 898.96
$$

---

Problem 3:

$$
305.94 + 74.61
$$
- Align the decimals:
$$
\begin{array}{r}
305.94 \\
+ 74.61 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(4 + 1 = 5\).
- Tenths place: \(9 + 6 = 15\) → Write down 5, carry 1.
- Units place: \(5 + 4 + 1 = 10\) → Write down 0, carry 1.
- Tens place: \(0 + 7 + 1 = 8\).
- Hundreds place: \(3 + 0 = 3\).

Result:
$$
305.94 + 74.61 = 380.55
$$

---

Problem 4:

$$
48.13 + 562.78
$$
- Align the decimals:
$$
\begin{array}{r}
48.13 \\
+ 562.78 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(3 + 8 = 11\) → Write down 1, carry 1.
- Tenths place: \(1 + 7 + 1 = 9\).
- Units place: \(8 + 2 = 10\) → Write down 0, carry 1.
- Tens place: \(4 + 6 + 1 = 11\) → Write down 1, carry 1.
- Hundreds place: \(0 + 5 + 1 = 6\).

Result:
$$
48.13 + 562.78 = 610.91
$$

---

Problem 5:

$$
0.2 + 6.34
$$
- Align the decimals:
$$
\begin{array}{r}
0.20 \\
+ 6.34 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(0 + 4 = 4\).
- Tenths place: \(2 + 3 = 5\).
- Units place: \(0 + 6 = 6\).

Result:
$$
0.2 + 6.34 = 6.54
$$

---

Problem 6:

$$
620.8 + 9.2
$$
- Align the decimals:
$$
\begin{array}{r}
620.80 \\
+ 9.20 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(0 + 0 = 0\).
- Tenths place: \(8 + 2 = 10\) → Write down 0, carry 1.
- Units place: \(0 + 9 + 1 = 10\) → Write down 0, carry 1.
- Tens place: \(2 + 0 + 1 = 3\).
- Hundreds place: \(6 + 0 = 6\).

Result:
$$
620.8 + 9.2 = 629.00
$$

---

Problem 7:

$$
621.75 + 234.86
$$
- Align the decimals:
$$
\begin{array}{r}
621.75 \\
+ 234.86 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(5 + 6 = 11\) → Write down 1, carry 1.
- Tenths place: \(7 + 8 + 1 = 16\) → Write down 6, carry 1.
- Units place: \(1 + 4 + 1 = 6\).
- Tens place: \(2 + 3 = 5\).
- Hundreds place: \(6 + 2 = 8\).

Result:
$$
621.75 + 234.86 = 856.61
$$

---

Problem 8:

$$
71.92 + 84.35
$$
- Align the decimals:
$$
\begin{array}{r}
71.92 \\
+ 84.35 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(2 + 5 = 7\).
- Tenths place: \(9 + 3 = 12\) → Write down 2, carry 1.
- Units place: \(1 + 4 + 1 = 6\).
- Tens place: \(7 + 8 = 15\) → Write down 5, carry 1.
- Hundreds place: \(0 + 0 + 1 = 1\).

Result:
$$
71.92 + 84.35 = 156.27
$$

---

Problem 9:

$$
43.91 + 521.3
$$
- Align the decimals:
$$
\begin{array}{r}
43.91 \\
+ 521.30 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(1 + 0 = 1\).
- Tenths place: \(9 + 3 = 12\) → Write down 2, carry 1.
- Units place: \(3 + 1 + 1 = 5\).
- Tens place: \(4 + 2 = 6\).
- Hundreds place: \(0 + 5 = 5\).

Result:
$$
43.91 + 521.3 = 565.21
$$

---

Problem 10:

$$
90.4 + 418.53
$$
- Align the decimals:
$$
\begin{array}{r}
90.40 \\
+ 418.53 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(0 + 3 = 3\).
- Tenths place: \(4 + 5 = 9\).
- Units place: \(0 + 8 = 8\).
- Tens place: \(9 + 1 = 10\) → Write down 0, carry 1.
- Hundreds place: \(0 + 4 + 1 = 5\).

Result:
$$
90.4 + 418.53 = 508.93
$$

---

Problem 11:

$$
521.3 + 152.47
$$
- Align the decimals:
$$
\begin{array}{r}
521.30 \\
+ 152.47 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(0 + 7 = 7\).
- Tenths place: \(3 + 4 = 7\).
- Units place: \(1 + 2 = 3\).
- Tens place: \(2 + 5 = 7\).
- Hundreds place: \(5 + 1 = 6\).

Result:
$$
521.3 + 152.47 = 673.77
$$

---

Problem 12:

$$
675.52 + 97.6
$$
- Align the decimals:
$$
\begin{array}{r}
675.52 \\
+ 97.60 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(2 + 0 = 2\).
- Tenths place: \(5 + 6 = 11\) → Write down 1, carry 1.
- Units place: \(5 + 7 + 1 = 13\) → Write down 3, carry 1.
- Tens place: \(7 + 9 + 1 = 17\) → Write down 7, carry 1.
- Hundreds place: \(6 + 0 + 1 = 7\).

Result:
$$
675.52 + 97.6 = 773.12
$$

---

Problem 13:

$$
1.05 + 32.48
$$
- Align the decimals:
$$
\begin{array}{r}
1.05 \\
+ 32.48 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(5 + 8 = 13\) → Write down 3, carry 1.
- Tenths place: \(0 + 4 + 1 = 5\).
- Units place: \(1 + 2 = 3\).
- Tens place: \(0 + 3 = 3\).

Result:
$$
1.05 + 32.48 = 33.53
$$

---

Problem 14:

$$
67.52 + 903.18
$$
- Align the decimals:
$$
\begin{array}{r}
67.52 \\
+ 903.18 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(2 + 8 = 10\) → Write down 0, carry 1.
- Tenths place: \(5 + 1 + 1 = 7\).
- Units place: \(7 + 3 = 10\) → Write down 0, carry 1.
- Tens place: \(6 + 0 + 1 = 7\).
- Hundreds place: \(0 + 9 = 9\).

Result:
$$
67.52 + 903.18 = 970.70
$$

---

Problem 15:

$$
847.19 + 50.8
$$
- Align the decimals:
$$
\begin{array}{r}
847.19 \\
+ 50.80 \\
\hline
\end{array}
$$
- Add column by column:
- Hundredths place: \(9 + 0 = 9\).
- Tenths place: \(1 + 8 = 9\).
- Units place: \(7 + 0 = 7\).
- Tens place: \(4 + 5 = 9\).
- Hundreds place: \(8 + 0 = 8\).

Result:
$$
847.19 + 50.8 = 897.99
$$

---

Final Answers:

$$
\boxed{
\begin{array}{l}
1) \, 303.90 \\
2) \, 898.96 \\
3) \, 380.55 \\
4) \, 610.91 \\
5) \, 6.54 \\
6) \, 629.00 \\
7) \, 856.61 \\
8) \, 156.27 \\
9) \, 565.21 \\
10) \, 508.93 \\
11) \, 673.77 \\
12) \, 773.12 \\
13) \, 33.53 \\
14) \, 970.70 \\
15) \, 897.99 \\
\end{array}
}
$$