Number Concepts 1-20 Worksheets - Free Printable

Let's solve this step-by-step.

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Part 1: Circle the numeral that matches the number of stars in each pair of dominoes

Each section (a through i) shows two domino-like boxes with stars. You need to:
- Count the total number of stars in both boxes.
- Then circle the correct numeral from the options given.

We'll go one by one:

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#### a)
Top box: 6 stars
Bottom box: 8 stars
Total = 6 + 8 = 14
Options: 13, 16, 14 → ✔ Circle 14

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#### b)
Top box: 5 stars
Bottom box: 9 stars
Total = 5 + 9 = 14
Options: 12, 14, 16 → ✔ Circle 14

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#### c)
Top box: 9 stars
Bottom box: 9 stars
Total = 9 + 9 = 18
Options: 20, 18, 19 → ✔ Circle 18

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#### d)
Top box: 9 stars
Bottom box: 6 stars
Total = 9 + 6 = 15
Options: 13, 19, 15 → ✔ Circle 15

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#### e)
Top box: 9 stars
Bottom box: 8 stars
Total = 9 + 8 = 17
Options: 19, 17, 16 → ✔ Circle 17

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#### f)
Top box: 5 stars
Bottom box: 6 stars
Total = 5 + 6 = 11
Options: 12, 13, 11 → ✔ Circle 11

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#### g)
Top box: 8 stars
Bottom box: 7 stars
Total = 8 + 7 = 15
Options: 12, 13, 15 → ✔ Circle 15

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#### h)
Top box: 9 stars
Bottom box: 8 stars
Total = 9 + 8 = 17
Options: 17, 19, 16 → ✔ Circle 17

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#### i)
Top box: 9 stars
Bottom box: 9 stars
Total = 9 + 9 = 18
Options: 18, 19, 17 → ✔ Circle 18

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Summary of Answers for a–i:

- a) 14
- b) 14
- c) 18
- d) 15
- e) 17
- f) 11
- g) 15
- h) 17
- i) 18

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Part 2: Count by 1’s to 20

Fill in the blanks:

#### First line: Count from 1 to 10
> 1, ____, ____, ____, ____, ____, ____, ____, ____, ____
→ Fill in: 2, 3, 4, 5, 6, 7, 8, 9, 10

#### Second line: Count from 11 to 20
> 11, ____, ____, ____, ____, ____, ____, ____, ____, ____
→ Fill in: 12, 13, 14, 15, 16, 17, 18, 19, 20

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✔ Final Answer Key:

#### Circle the correct numbers:
- a) 14
- b) 14
- c) 18
- d) 15
- e) 17
- f) 11
- g) 15
- h) 17
- i) 18

#### Counting:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
11, 12, 13, 14, 15, 16, 17, 18, 19, 20

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This worksheet helps build number sense and counting skills for numbers 11–20. The key is careful counting and matching visual sets to numerals.