First-grade math worksheet teaching ordinal numbers 1st through 5th using a lineup of cartoon animals.

Problem Analysis:

The task involves identifying and labeling the animals in a sequence using ordinal numbers (1st, 2nd, 3rd, 4th, 5th). The animals are:

1. Ladybug
2. Cow
3. Goat
4. Frog
5. Bear

The goal is to write the ordinal numbers under the correct pictures and then fill in the blanks in the sentences based on their positions.

---

Step-by-Step Solution:

#### Step 1: Label the Animals with Ordinal Numbers
We need to assign the ordinal numbers (1st, 2nd, 3rd, 4th, 5th) to the animals in the order they appear in the image.

- The first animal is the ladybug.
- The second animal is the cow.
- The third animal is the goat.
- The fourth animal is the frog.
- The fifth animal is the bear.

So, we write the ordinal numbers under the corresponding pictures:

```
______ ______ ______ ______ ______
1st 2nd 3rd 4th 5th
```

#### Step 2: Fill in the Blanks in the Sentences
Now, we use the positions of the animals to fill in the blanks in the sentences:

1. The frog is in the ______ place.
- The frog is the fourth animal.
- So, the answer is: 4th

2. The bear is in the ______ place.
- The bear is the fifth animal.
- So, the answer is: 5th

3. The cow is in the ______ place.
- The cow is the second animal.
- So, the answer is: 2nd

4. The ladybug is in the ______ place.
- The ladybug is the first animal.
- So, the answer is: 1st

5. The goat is in the ______ place.
- The goat is the third animal.
- So, the answer is: 3rd

#### Final Answers:
- Under the pictures:
```
1st 2nd 3rd 4th 5th
```

- In the sentences:
1. The frog is in the 4th place.
2. The bear is in the 5th place.
3. The cow is in the 2nd place.
4. The ladybug is in the 1st place.
5. The goat is in the 3rd place.

---

Final Answer:

\boxed{
\begin{aligned}
&\text{Under the pictures:} \\
&1st \quad 2nd \quad 3rd \quad 4th \quad 5th \\
&\text{In the sentences:} \\
&1. \text{The frog is in the } \mathbf{4th} \text{ place.} \\
&2. \text{The bear is in the } \mathbf{5th} \text{ place.} \\
&3. \text{The cow is in the } \mathbf{2nd} \text{ place.} \\
&4. \text{The ladybug is in the } \mathbf{1st} \text{ place.} \\
&5. \text{The goat is in the } \mathbf{3rd} \text{ place.}
\end{aligned}
}