Odd and even numbers worksheet with blocks to count and circle odd or even.

Problem Description:

The task involves counting the number of blocks in each row and determining whether the count is an odd or even number. The goal is to write the total number of blocks and circle whether it is odd or even.

Solution Approach:

1. Count the Blocks: For each row, count the total number of blocks.
2. Determine Odd or Even:
- A number is even if it is divisible by 2 (i.e., has no remainder when divided by 2).
- A number is odd if it is not divisible by 2 (i.e., has a remainder of 1 when divided by 2).
3. Write the Number and Circle the Correct Option: Write the total number of blocks and circle "odd" or "even" based on the result.

Step-by-Step Solution:

#### Row 1:
- Count the blocks: There are 4 blocks.
- Determine odd or even: 4 is divisible by 2 (4 ÷ 2 = 2 with no remainder), so it is even.
- Write:
```
4 even
```

#### Row 2:
- Count the blocks: There are 3 blocks.
- Determine odd or even: 3 is not divisible by 2 (3 ÷ 2 = 1 with a remainder of 1), so it is odd.
- Write:
```
3 odd
```

#### Row 3:
- Count the blocks: There are 8 blocks.
- Determine odd or even: 8 is divisible by 2 (8 ÷ 2 = 4 with no remainder), so it is even.
- Write:
```
8 even
```

#### Row 4:
- Count the blocks: There are 9 blocks.
- Determine odd or even: 9 is not divisible by 2 (9 ÷ 2 = 4 with a remainder of 1), so it is odd.
- Write:
```
9 odd
```

#### Row 5:
- Count the blocks: There are 5 blocks.
- Determine odd or even: 5 is not divisible by 2 (5 ÷ 2 = 2 with a remainder of 1), so it is odd.
- Write:
```
5 odd
```

#### Row 6:
- Count the blocks: There are 6 blocks.
- Determine odd or even: 6 is divisible by 2 (6 ÷ 2 = 3 with no remainder), so it is even.
- Write:
```
6 even
```

Final Answer:

```
Row 1: 4 even
Row 2: 3 odd
Row 3: 8 even
Row 4: 9 odd
Row 5: 5 odd
Row 6: 6 even
```

Thus, the completed worksheet would look like this:

| Blocks | Number | Odd | Even |
|--------|--------|-----|------|
| | 4 | | ☐ |
| | 3 | ☐ | |
| | 8 | | ☐ |
| | 9 | ☐ | |
| | 5 | ☐ | |
| | 6 | | ☐ |

Final Answer: \boxed{4 \text{ even}, 3 \text{ odd}, 8 \text{ even}, 9 \text{ odd}, 5 \text{ odd}, 6 \text{ even}}