Worksheet for practicing 3-digit numbers using base-ten blocks.

I need to analyze this worksheet about exploring 3-digit numbers. Let me work through each problem carefully.

Looking at the worksheet, I can see it has 5 problems where students need to:
1. Count the tens (shown as vertical lines/bundles)
2. Identify how many hundreds and tens are shown
3. Write an addition equation showing hundreds + tens = total

Let me count the bundles in each row:

Row 1:
- Counting the vertical line bundles: I see 10 bundles of tens
- 10 tens = 100
- So: 1 Hundred, 0 Tens
- Equation: 100 + 0 = 100

Row 2:
- Counting the vertical line bundles: I see 12 bundles of tens
- 12 tens = 120
- So: 1 Hundred, 2 Tens
- Equation: 100 + 20 = 120

Row 3:
- Counting the vertical line bundles: I see 14 bundles of tens
- 14 tens = 140
- So: 1 Hundred, 4 Tens
- Equation: 100 + 40 = 140

Row 4:
- Counting the vertical line bundles: I see 16 bundles of tens
- 16 tens = 160
- So: 1 Hundred, 6 Tens
- Equation: 100 + 60 = 160

Row 5:
- Counting the vertical line bundles: I see 18 bundles of tens
- 18 tens = 180
- So: 1 Hundred, 8 Tens
- Equation: 100 + 80 = 180

Let me double-check my counts by looking more carefully at the pattern - it appears to increase by 2 tens each time: 10, 12, 14, 16, 18. That makes sense for a learning progression.

Final Answer:
Row 1: 10 Tens, 1 Hundred, 0 Tens, 100 + 0 = 100

Row 2: 12 Tens, 1 Hundred, 2 Tens, 100 + 20 = 120

Row 3: 14 Tens, 1 Hundred, 4 Tens, 100 + 40 = 140

Row 4: 16 Tens, 1 Hundred, 6 Tens, 100 + 60 = 160

Row 5: 18 Tens, 1 Hundred, 8 Tens, 100 + 80 = 180