Workbook Detail
Number Line 1 20 Starter — Set 3
Find the missing number on the number line (9 to 33, step 1)
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Answer: 27
- Start
- 9
- End
- 33
- Step
- 1
- Markers
- {"value":9,"blank":false}
- {"value":10,"blank":false}
- {"value":11,"blank":false}
- {"value":12,"blank":false}
- {"value":13,"blank":false}
- {"value":14,"blank":false}
- {"value":15,"blank":false}
- {"value":16,"blank":false}
- {"value":17,"blank":false}
- {"value":18,"blank":false}
- {"value":19,"blank":false}
- {"value":20,"blank":false}
- {"value":21,"blank":false}
- {"value":22,"blank":false}
- {"value":23,"blank":false}
- {"value":24,"blank":false}
- {"value":25,"blank":false}
- {"value":26,"blank":false}
- {"value":27,"blank":true}
- {"value":28,"blank":false}
- {"value":29,"blank":false}
- {"value":30,"blank":false}
- {"value":31,"blank":false}
- {"value":32,"blank":false}
- {"value":33,"blank":false}
Find the missing number on the number line (5 to 15, step 3)
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Answer: 5
- Start
- 5
- End
- 15
- Step
- 3
- Markers
- {"value":5,"blank":true}
- {"value":8,"blank":false}
- {"value":11,"blank":false}
- {"value":14,"blank":false}
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#AA8ED6" d="M36 32c0 2.209-1.791 4-4 4H4c-2.209 0-4-1.791-4-4V4c0-2.209 1.791-4 4-4h28c2.209 0 4 1.791 4 4v28z"/></g></svg>AltText: purple squarePlacement: before-question
- VisualToken
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Find the missing number on the number line (15 to 28, step 2)
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Answer: 27
- Start
- 15
- End
- 28
- Step
- 2
- Markers
- {"value":15,"blank":false}
- {"value":17,"blank":false}
- {"value":19,"blank":false}
- {"value":21,"blank":false}
- {"value":23,"blank":false}
- {"value":25,"blank":false}
- {"value":27,"blank":true}
Find the missing number on the number line (19 to 39, step 2)
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Answer: 29
- Start
- 19
- End
- 39
- Step
- 2
- Markers
- {"value":19,"blank":false}
- {"value":21,"blank":false}
- {"value":23,"blank":false}
- {"value":25,"blank":false}
- {"value":27,"blank":false}
- {"value":29,"blank":true}
- {"value":31,"blank":false}
- {"value":33,"blank":false}
- {"value":35,"blank":false}
- {"value":37,"blank":false}
- {"value":39,"blank":false}
Find the missing number on the number line (18 to 44, step 4)
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Answer: 26
- Start
- 18
- End
- 44
- Step
- 4
- Markers
- {"value":18,"blank":false}
- {"value":22,"blank":false}
- {"value":26,"blank":true}
- {"value":30,"blank":false}
- {"value":34,"blank":false}
- {"value":38,"blank":false}
- {"value":42,"blank":false}
Find the missing number on the number line (19 to 45, step 1)
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Answer: 45
- Start
- 19
- End
- 45
- Step
- 1
- Markers
- {"value":19,"blank":false}
- {"value":20,"blank":false}
- {"value":21,"blank":false}
- {"value":22,"blank":false}
- {"value":23,"blank":false}
- {"value":24,"blank":false}
- {"value":25,"blank":false}
- {"value":26,"blank":false}
- {"value":27,"blank":false}
- {"value":28,"blank":false}
- {"value":29,"blank":false}
- {"value":30,"blank":false}
- {"value":31,"blank":false}
- {"value":32,"blank":false}
- {"value":33,"blank":false}
- {"value":34,"blank":false}
- {"value":35,"blank":false}
- {"value":36,"blank":false}
- {"value":37,"blank":false}
- {"value":38,"blank":false}
- {"value":39,"blank":false}
- {"value":40,"blank":false}
- {"value":41,"blank":false}
- {"value":42,"blank":false}
- {"value":43,"blank":false}
- {"value":44,"blank":false}
- {"value":45,"blank":true}
Find the missing number on the number line (6 to 22, step 3)
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Answer: 15
- Start
- 6
- End
- 22
- Step
- 3
- Markers
- {"value":6,"blank":false}
- {"value":9,"blank":false}
- {"value":12,"blank":false}
- {"value":15,"blank":true}
- {"value":18,"blank":false}
- {"value":21,"blank":false}
Find the missing number on the number line (24 to 45, step 3)
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Answer: 42
- Start
- 24
- End
- 45
- Step
- 3
- Markers
- {"value":24,"blank":false}
- {"value":27,"blank":false}
- {"value":30,"blank":false}
- {"value":33,"blank":false}
- {"value":36,"blank":false}
- {"value":39,"blank":false}
- {"value":42,"blank":true}
- {"value":45,"blank":false}
Find the missing number on the number line (0 to 12, step 4)
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Answer: 8
- Start
- 0
- End
- 12
- Step
- 4
- Markers
- {"value":0,"blank":false}
- {"value":4,"blank":false}
- {"value":8,"blank":true}
- {"value":12,"blank":false}
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#FDCB58" d="M35.885 11.833c0-5.45-4.418-9.868-9.867-9.868-3.308 0-6.227 1.633-8.018 4.129-1.791-2.496-4.71-4.129-8.017-4.129-5.45 0-9.868 4.417-9.868 9.868 0 .772.098 1.52.266 2.241C1.751 22.587 11.216 31.568 18 34.034c6.783-2.466 16.249-11.447 17.617-19.959.17-.721.268-1.469.268-2.242z"/></g></svg>AltText: heart yellowPlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f49b","name":"heart-yellow","count":1,"role":"badge"}]
Find the missing number on the number line (10 to 21, step 1)
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Answer: 15
- Start
- 10
- End
- 21
- Step
- 1
- Markers
- {"value":10,"blank":false}
- {"value":11,"blank":false}
- {"value":12,"blank":false}
- {"value":13,"blank":false}
- {"value":14,"blank":false}
- {"value":15,"blank":true}
- {"value":16,"blank":false}
- {"value":17,"blank":false}
- {"value":18,"blank":false}
- {"value":19,"blank":false}
- {"value":20,"blank":false}
- {"value":21,"blank":false}
Find the missing number on the number line (21 to 32, step 2)
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Answer: 21
- Start
- 21
- End
- 32
- Step
- 2
- Markers
- {"value":21,"blank":true}
- {"value":23,"blank":false}
- {"value":25,"blank":false}
- {"value":27,"blank":false}
- {"value":29,"blank":false}
- {"value":31,"blank":false}
Find the missing number on the number line (8 to 25, step 4)
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Answer: 16
- Start
- 8
- End
- 25
- Step
- 4
- Markers
- {"value":8,"blank":false}
- {"value":12,"blank":false}
- {"value":16,"blank":true}
- {"value":20,"blank":false}
- {"value":24,"blank":false}
Find the missing number on the number line (24 to 30, step 3)
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Answer: 30
- Start
- 24
- End
- 30
- Step
- 3
- Markers
- {"value":24,"blank":false}
- {"value":27,"blank":false}
- {"value":30,"blank":true}
Find the missing number on the number line (1 to 18, step 3)
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Answer: 10
- Start
- 1
- End
- 18
- Step
- 3
- Markers
- {"value":1,"blank":false}
- {"value":4,"blank":false}
- {"value":7,"blank":false}
- {"value":10,"blank":true}
- {"value":13,"blank":false}
- {"value":16,"blank":false}
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#F4900C" d="M36 32c0 2.209-1.791 4-4 4H4c-2.209 0-4-1.791-4-4V4c0-2.209 1.791-4 4-4h28c2.209 0 4 1.791 4 4v28z"/></g></svg>AltText: orange squarePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f7e7","name":"orange-square","count":1,"role":"badge"}]
Find the missing number on the number line (22 to 36, step 1)
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Answer: 36
- Start
- 22
- End
- 36
- Step
- 1
- Markers
- {"value":22,"blank":false}
- {"value":23,"blank":false}
- {"value":24,"blank":false}
- {"value":25,"blank":false}
- {"value":26,"blank":false}
- {"value":27,"blank":false}
- {"value":28,"blank":false}
- {"value":29,"blank":false}
- {"value":30,"blank":false}
- {"value":31,"blank":false}
- {"value":32,"blank":false}
- {"value":33,"blank":false}
- {"value":34,"blank":false}
- {"value":35,"blank":false}
- {"value":36,"blank":true}
Find the missing number on the number line (0 to 20, step 2)
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Answer: 8
- Start
- 0
- End
- 20
- Step
- 2
- Markers
- {"value":0,"blank":false}
- {"value":2,"blank":false}
- {"value":4,"blank":false}
- {"value":6,"blank":false}
- {"value":8,"blank":true}
- {"value":10,"blank":false}
- {"value":12,"blank":false}
- {"value":14,"blank":false}
- {"value":16,"blank":false}
- {"value":18,"blank":false}
- {"value":20,"blank":false}
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#78B159" d="M36 32c0 2.209-1.791 4-4 4H4c-2.209 0-4-1.791-4-4V4c0-2.209 1.791-4 4-4h28c2.209 0 4 1.791 4 4v28z"/></g></svg>AltText: green squarePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f7e9","name":"green-square","count":1,"role":"badge"}]
Find the missing number on the number line (3 to 24, step 3)
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Answer: 12
- Start
- 3
- End
- 24
- Step
- 3
- Markers
- {"value":3,"blank":false}
- {"value":6,"blank":false}
- {"value":9,"blank":false}
- {"value":12,"blank":true}
- {"value":15,"blank":false}
- {"value":18,"blank":false}
- {"value":21,"blank":false}
- {"value":24,"blank":false}
Find the missing number on the number line (0 to 24, step 2)
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Answer: 12
- Start
- 0
- End
- 24
- Step
- 2
- Markers
- {"value":0,"blank":false}
- {"value":2,"blank":false}
- {"value":4,"blank":false}
- {"value":6,"blank":false}
- {"value":8,"blank":false}
- {"value":10,"blank":false}
- {"value":12,"blank":true}
- {"value":14,"blank":false}
- {"value":16,"blank":false}
- {"value":18,"blank":false}
- {"value":20,"blank":false}
- {"value":22,"blank":false}
- {"value":24,"blank":false}
Find the missing number on the number line (2 to 31, step 3)
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Answer: 23
- Start
- 2
- End
- 31
- Step
- 3
- Markers
- {"value":2,"blank":false}
- {"value":5,"blank":false}
- {"value":8,"blank":false}
- {"value":11,"blank":false}
- {"value":14,"blank":false}
- {"value":17,"blank":false}
- {"value":20,"blank":false}
- {"value":23,"blank":true}
- {"value":26,"blank":false}
- {"value":29,"blank":false}
Find the missing number on the number line (15 to 40, step 4)
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Answer: 31
- Start
- 15
- End
- 40
- Step
- 4
- Markers
- {"value":15,"blank":false}
- {"value":19,"blank":false}
- {"value":23,"blank":false}
- {"value":27,"blank":false}
- {"value":31,"blank":true}
- {"value":35,"blank":false}
- {"value":39,"blank":false}
Teaching Notes
Practice number line 1 20 with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
Frequently Asked Questions
How do I use this Number Line 1 20 Starter Worksheets worksheet?
Print the worksheet and complete the problems. Each set number generates a unique arrangement. Use the same set number for all students in a class for consistent assessment.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.