Multiply by zeros worksheet - Free Printable

Let's solve each problem on the math worksheet step by step. These are all multiplication problems involving multiples of 100, so we can use a simple strategy: multiply the non-zero digits first, then add the zeros at the end.

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Solutions:

#### 1 a.
600 × 4
= (6 × 4) × 100
= 24 × 100 = 2400

#### 1 b.
5 × 400
= 5 × 4 × 100
= 20 × 100 = 2000

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#### 2 a.
9 × 900
= 9 × 9 × 100
= 81 × 100 = 8100

#### 2 b.
500 × 6
= 5 × 6 × 100
= 30 × 100 = 3000

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#### 3 a.
200 × 9
= 2 × 9 × 100
= 18 × 100 = 1800

#### 3 b.
700 × 7
= 7 × 7 × 100
= 49 × 100 = 4900

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#### 4 a.
500 × 5
= 5 × 5 × 100
= 25 × 100 = 2500

#### 4 b.
600 × 7
= 6 × 7 × 100
= 42 × 100 = 4200

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#### 5 a.
7 × 800
= 7 × 8 × 100
= 56 × 100 = 5600

#### 5 b.
500 × 8
= 5 × 8 × 100
= 40 × 100 = 4000

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#### 6 a.
5 × 700
= 5 × 7 × 100
= 35 × 100 = 3500

#### 6 b.
6 × 900
= 6 × 9 × 100
= 54 × 100 = 5400

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#### 7 a.
200 × 3
= 2 × 3 × 100
= 6 × 100 = 600

#### 7 b.
3 × 600
= 3 × 6 × 100
= 18 × 100 = 1800

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#### 8 a.
800 × 9
= 8 × 9 × 100
= 72 × 100 = 7200

#### 8 b.
700 × 8
= 7 × 8 × 100
= 56 × 100 = 5600

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#### 9 a.
900 × 9
= 9 × 9 × 100
= 81 × 100 = 8100

#### 9 b.
900 × 2
= 9 × 2 × 100
= 18 × 100 = 1800

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#### 10 a.
7 × 600
= 7 × 6 × 100
= 42 × 100 = 4200

#### 10 b.
800 × 5
= 8 × 5 × 100
= 40 × 100 = 4000

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✔ Final Answers:

| Problem | Answer |
|--------|--------|
| 1 a. | 2400 |
| 1 b. | 2000 |
| 2 a. | 8100 |
| 2 b. | 3000 |
| 3 a. | 1800 |
| 3 b. | 4900 |
| 4 a. | 2500 |
| 4 b. | 4200 |
| 5 a. | 5600 |
| 5 b. | 4000 |
| 6 a. | 3500 |
| 6 b. | 5400 |
| 7 a. | 600 |
| 7 b. | 1800 |
| 8 a. | 7200 |
| 8 b. | 5600 |
| 9 a. | 8100 |
| 9 b. | 1800 |
| 10 a. | 4200 |
| 10 b. | 4000 |

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📝 Explanation:

The key idea is to ignore the zeros initially, multiply the base numbers, and then add back the zeros (from the original numbers). For example:
- 600 × 4 → 6 × 4 = 24 → add two zeros → 2400

This method makes large multiplications easy and fast!

Let me know if you'd like this in printable format or with steps shown!