Students use base 10 blocks to write numbers in tens and ones place value.

I will solve this worksheet by examining each problem, counting the base 10 blocks, and writing the corresponding number. I'll go through them one by one.

Problem 1

- Look closely: I see one long "ten" block and three small "one" blocks.
- Calculate: 1 ten + 3 ones = 10 + 3 = 13
- Answer for 1: 13

Problem 2

- Look closely: I see three "ten" blocks and five "one" blocks.
- Calculate: 3 tens + 5 ones = 30 + 5 = 35
- Answer for 2: 35

Problem 3

- Look closely: I see six "ten" blocks and one "one" block.
- Calculate: 6 tens + 1 one = 60 + 1 = 61
- Answer for 3: 61

Problem 4

- Look closely: I see two "ten" blocks and seven "one" blocks.
- Calculate: 2 tens + 7 ones = 20 + 7 = 27
- Answer for 4: 27

Problem 5

- Look closely: I see four "ten" blocks and zero "one" blocks.
- Calculate: 4 tens + 0 ones = 40 + 0 = 40
- Answer for 5: 40

Problem 6

- Look closely: I see five "ten" blocks and four "one" blocks.
- Calculate: 5 tens + 4 ones = 50 + 4 = 54
- Answer for 6: 54

Problem 7

- Look closely: I see seven "ten" blocks and zero "one" blocks.
- Calculate: 7 tens + 0 ones = 70 + 0 = 70
- Answer for 7: 70

Problem 8

- Look closely: I see one "ten" block and eight "one" blocks.
- Calculate: 1 ten + 8 ones = 10 + 8 = 18
- Answer for 8: 18

Problem 9

- Look closely: I see two "ten" blocks and one "one" block.
- Calculate: 2 tens + 1 one = 20 + 1 = 21
- Answer for 9: 21

Problem 10

- Look closely: I see zero "ten" blocks and nine "one" blocks.
- Calculate: 0 tens + 9 ones = 0 + 9 = 9
- Answer for 10: 9

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## Final Answers:
1. 13
2. 35
3. 61
4. 27
5. 40
6. 54
7. 70
8. 18
9. 21
10. 9