Decimal multiplication worksheet focusing on money notation, ideal for practicing multiplication with monetary values.

Problem: Solve the decimal multiplication problems with money notation.

The task involves multiplying monetary values by whole numbers. Let's solve each problem step by step.

---

#### Problem 1:
$$
\$5.78 \times 8
$$

1. Multiply as if they were whole numbers:
$$
578 \times 8 = 4624
$$

2. Count the number of decimal places in the original numbers:
- \$5.78 has 2 decimal places.
- 8 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
4624 \rightarrow 46.24
$$

4. Add the dollar sign:
$$
\$46.24
$$

Answer for Problem 1:
$$
\boxed{\$46.24}
$$

---

#### Problem 2:
$$
\$2.57 \times 9
$$

1. Multiply as if they were whole numbers:
$$
257 \times 9 = 2313
$$

2. Count the number of decimal places in the original numbers:
- \$2.57 has 2 decimal places.
- 9 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
2313 \rightarrow 23.13
$$

4. Add the dollar sign:
$$
\$23.13
$$

Answer for Problem 2:
$$
\boxed{\$23.13}
$$

---

#### Problem 3:
$$
\$9.21 \times 4
$$

1. Multiply as if they were whole numbers:
$$
921 \times 4 = 3684
$$

2. Count the number of decimal places in the original numbers:
- \$9.21 has 2 decimal places.
- 4 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
3684 \rightarrow 36.84
$$

4. Add the dollar sign:
$$
\$36.84
$$

Answer for Problem 3:
$$
\boxed{\$36.84}
$$

---

#### Problem 4:
$$
\$7.45 \times 4
$$

1. Multiply as if they were whole numbers:
$$
745 \times 4 = 2980
$$

2. Count the number of decimal places in the original numbers:
- \$7.45 has 2 decimal places.
- 4 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
2980 \rightarrow 29.80
$$

4. Add the dollar sign:
$$
\$29.80
$$

Answer for Problem 4:
$$
\boxed{\$29.80}
$$

---

#### Problem 5:
$$
\$4.67 \times 3
$$

1. Multiply as if they were whole numbers:
$$
467 \times 3 = 1401
$$

2. Count the number of decimal places in the original numbers:
- \$4.67 has 2 decimal places.
- 3 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
1401 \rightarrow 14.01
$$

4. Add the dollar sign:
$$
\$14.01
$$

Answer for Problem 5:
$$
\boxed{\$14.01}
$$

---

#### Problem 6:
$$
\$2.56 \times 1
$$

1. Multiply as if they were whole numbers:
$$
256 \times 1 = 256
$$

2. Count the number of decimal places in the original numbers:
- \$2.56 has 2 decimal places.
- 1 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
256 \rightarrow 2.56
$$

4. Add the dollar sign:
$$
\$2.56
$$

Answer for Problem 6:
$$
\boxed{\$2.56}
$$

---

#### Problem 7:
$$
\$8.13 \times 2
$$

1. Multiply as if they were whole numbers:
$$
813 \times 2 = 1626
$$

2. Count the number of decimal places in the original numbers:
- \$8.13 has 2 decimal places.
- 2 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
1626 \rightarrow 16.26
$$

4. Add the dollar sign:
$$
\$16.26
$$

Answer for Problem 7:
$$
\boxed{\$16.26}
$$

---

#### Problem 8:
$$
\$6.34 \times 2
$$

1. Multiply as if they were whole numbers:
$$
634 \times 2 = 1268
$$

2. Count the number of decimal places in the original numbers:
- \$6.34 has 2 decimal places.
- 2 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
1268 \rightarrow 12.68
$$

4. Add the dollar sign:
$$
\$12.68
$$

Answer for Problem 8:
$$
\boxed{\$12.68}
$$

---

#### Problem 9:
$$
\$4.22 \times 6
$$

1. Multiply as if they were whole numbers:
$$
422 \times 6 = 2532
$$

2. Count the number of decimal places in the original numbers:
- \$4.22 has 2 decimal places.
- 6 has 0 decimal places.
- Total decimal places: \(2 + 0 = 2\).

3. Place the decimal point in the result:
$$
2532 \rightarrow 25.32
$$

4. Add the dollar sign:
$$
\$25.32
$$

Answer for Problem 9:
$$
\boxed{\$25.32}
$$

---

Final Answers:

1. \$46.24
2. \$23.13
3. \$36.84
4. \$29.80
5. \$14.01
6. \$2.56
7. \$16.26
8. \$12.68
9. \$25.32

$$
\boxed{\$46.24, \$23.13, \$36.84, \$29.80, \$14.01, \$2.56, \$16.26, \$12.68, \$25.32}
$$