Base Ten Blocks worksheet for learning place value with visual representations of numbers.

To solve the problem, we need to interpret the base ten blocks shown in each row and determine the number they represent. Base ten blocks are a visual tool used to represent numbers in the decimal system, where:

- Large squares represent hundreds (100 each).
- Tall rectangles represent tens (10 each).
- Small yellow cubes represent ones (1 each).

Let's analyze each row step by step:

---

Row 1:

- Large squares (hundreds): There are 3 large squares.
- Each square represents 100, so \( 3 \times 100 = 300 \).
- Tall rectangles (tens): There are 4 tall rectangles.
- Each rectangle represents 10, so \( 4 \times 10 = 40 \).
- Small yellow cubes (ones): There are 5 small yellow cubes.
- Each cube represents 1, so \( 5 \times 1 = 5 \).

Adding these together:
\[
300 + 40 + 5 = 345
\]

So, the number represented in Row 1 is 345.

---

Row 2:

- Large squares (hundreds): There are 2 large squares.
- Each square represents 100, so \( 2 \times 100 = 200 \).
- Tall rectangles (tens): There are 0 tall rectangles.
- Each rectangle represents 10, so \( 0 \times 10 = 0 \).
- Small yellow cubes (ones): There are 6 small yellow cubes.
- Each cube represents 1, so \( 6 \times 1 = 6 \).

Adding these together:
\[
200 + 0 + 6 = 206
\]

So, the number represented in Row 2 is 206.

---

Row 3:

- Large squares (hundreds): There is 1 large square.
- Each square represents 100, so \( 1 \times 100 = 100 \).
- Tall rectangles (tens): There are 9 tall rectangles.
- Each rectangle represents 10, so \( 9 \times 10 = 90 \).
- Small yellow cubes (ones): There are 7 small yellow cubes.
- Each cube represents 1, so \( 7 \times 1 = 7 \).

Adding these together:
\[
100 + 90 + 7 = 197
\]

So, the number represented in Row 3 is 197.

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Final Answer:

\[
\boxed{345, 206, 197}
\]