Count the beads on each abacus and write the place value.

Let's solve the abacus problem step by step.

Understanding the Abacus:

Each abacus has four columns representing place values:
- Th = Thousands
- H = Hundreds
- T = Tens
- O = Ones

On an abacus:
- Upper beads (usually 1 per rod) are worth 5 each.
- Lower beads (usually 4 per rod) are worth 1 each.

To find the value of a column:
- Count how many upper beads are moved down toward the bar (each counts as 5).
- Count how many lower beads are moved up toward the bar (each counts as 1).
- Add them together.

We’ll go through each abacus one by one.

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Abacus 1 (Top-left)

- Thousands (Th): 0 upper, 1 lower → 1
- Hundreds (H): 1 upper (5), 2 lower (2) → 5 + 2 = 7
- Tens (T): 0 upper, 3 lower → 3
- Ones (O): 1 upper (5), 1 lower (1) → 5 + 1 = 6
→ Number: 1,736

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Abacus 2 (Top-middle)

- Th: 0 upper, 0 lower → 0
- H: 1 upper (5), 0 lower → 5
- T: 0 upper, 2 lower → 2
- O: 1 upper (5), 0 lower → 5
→ Number: 525

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Abacus 3 (Top-right)

- Th: 0 upper, 0 lower → 0
- H: 1 upper (5), 1 lower → 5 + 1 = 6
- T: 0 upper, 2 lower → 2
- O: 1 upper (5), 3 lower → 5 + 3 = 8
→ Number: 628

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Abacus 4 (Middle-left)

- Th: 1 upper (5), 0 lower → 5
- H: 0 upper, 4 lower → 4
- T: 1 upper (5), 0 lower → 5
- O: 0 upper, 2 lower → 2
→ Number: 5,452

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Abacus 5 (Middle-center)

- Th: 0 upper, 0 lower → 0
- H: 1 upper (5), 0 lower → 5
- T: 0 upper, 3 lower → 3
- O: 1 upper (5), 1 lower → 5 + 1 = 6
→ Number: 536

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Abacus 6 (Middle-right)

- Th: 0 upper, 0 lower → 0
- H: 0 upper, 2 lower → 2
- T: 1 upper (5), 0 lower → 5
- O: 0 upper, 1 lower → 1
→ Number: 251

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Abacus 7 (Bottom-left)

- Th: 0 upper, 0 lower → 0
- H: 1 upper (5), 0 lower → 5
- T: 0 upper, 3 lower → 3
- O: 0 upper, 1 lower → 1
→ Number: 531

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Abacus 8 (Bottom-middle)

- Th: 0 upper, 0 lower → 0
- H: 0 upper, 3 lower → 3
- T: 1 upper (5), 1 lower → 5 + 1 = 6
- O: 1 upper (5), 0 lower → 5
→ Number: 365

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Abacus 9 (Bottom-right)

- Th: 0 upper, 0 lower → 0
- H: 1 upper (5), 1 lower → 5 + 1 = 6
- T: 0 upper, 2 lower → 2
- O: 1 upper (5), 0 lower → 5
→ Number: 625

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Final Answers (Fill in the blanks):

1. 1,736
2. 525
3. 628
4. 5,452
5. 536
6. 251
7. 531
8. 365
9. 625

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✔ Answer Key:
```
1. 1,736
2. 525
3. 628
4. 5,452
5. 536
6. 251
7. 531
8. 365
9. 625
```

These are the numbers represented by each abacus. Each number corresponds to the total value of the beads in the respective place values (thousands, hundreds, tens, ones).