Decimal multiplication worksheet focusing on money notation, with nine problems to practice multiplying decimal amounts by whole numbers.

Let’s solve each problem one by one. We’re multiplying money amounts (dollars and cents) by whole numbers. Remember: when you multiply, treat the dollar amount like a regular number, then put the dollar sign and decimal point back in the right place.

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Problem 1: $5.78 × 8

Think of it as 578 cents × 8 = 4624 cents → which is $46.24
Or do it directly:

5.78
× 8
------
Start from right:
8 × 8 = 64 → write down 4, carry 6
8 × 7 = 56 + 6 = 62 → write down 2, carry 6
8 × 5 = 40 + 6 = 46 → write down 46

So: 46.24 → $46.24

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Problem 2: $2.57 × 9

2.57
× 9
------
9 × 7 = 63 → write 3, carry 6
9 × 5 = 45 + 6 = 51 → write 1, carry 5
9 × 2 = 18 + 5 = 23 → write 23

→ 23.13 → $23.13

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Problem 3: $9.21 × 4

9.21
× 4
------
4 × 1 = 4
4 × 2 = 8
4 × 9 = 36

→ 36.84 → $36.84

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Problem 4: $7.45 × 4

7.45
× 4
------
4 × 5 = 20 → write 0, carry 2
4 × 4 = 16 + 2 = 18 → write 8, carry 1
4 × 7 = 28 + 1 = 29 → write 29

→ 29.80 → $29.80

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Problem 5: $4.67 × 3

4.67
× 3
------
3 × 7 = 21 → write 1, carry 2
3 × 6 = 18 + 2 = 20 → write 0, carry 2
3 × 4 = 12 + 2 = 14 → write 14

→ 14.01 → $14.01

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Problem 6: $2.56 × 1

Anything times 1 is itself → $2.56

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Problem 7: $8.13 × 2

8.13
× 2
------
2 × 3 = 6
2 × 1 = 2
2 × 8 = 16

→ 16.26 → $16.26

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Problem 8: $6.34 × 2

6.34
× 2
------
2 × 4 = 8
2 × 3 = 6
2 × 6 = 12

→ 12.68 → $12.68

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Problem 9: $4.22 × 6

4.22
× 6
------
6 × 2 = 12 → write 2, carry 1
6 × 2 = 12 + 1 = 13 → write 3, carry 1
6 × 4 = 24 + 1 = 25 → write 25

→ 25.32 → $25.32

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Final Answer:
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