Workbook Detail
Number Line 1 20 Medium — Set 10
Find the missing number on the number line (23 to 48, step 1)
Show answer
Answer: 48
- Start
- 23
- End
- 48
- Step
- 1
- Markers
- {"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":false}
- {"value":46,"blank":false}
- {"value":47,"blank":false}
- {"value":48,"blank":true}
Find the missing number on the number line (11 to 17, step 3)
Show answer
Answer: 14
- Start
- 11
- End
- 17
- Step
- 3
- Markers
- {"value":11,"blank":false}
- {"value":14,"blank":true}
- {"value":17,"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)"><circle fill="#DD2E44" cx="18" cy="18" r="18"/></g></svg>AltText: red circlePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f534","name":"red-circle","count":1,"role":"badge"}]
Find the missing number on the number line (18 to 33, step 1)
Show answer
Answer: 19
- Start
- 18
- End
- 33
- Step
- 1
- Markers
- {"value":18,"blank":false}
- {"value":19,"blank":true}
- {"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}
Find the missing number on the number line (13 to 21, step 1)
Show answer
Answer: 15
- Start
- 13
- End
- 21
- Step
- 1
- Markers
- {"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 (16 to 30, step 2)
Show answer
Answer: 22
- Start
- 16
- End
- 30
- Step
- 2
- Markers
- {"value":16,"blank":false}
- {"value":18,"blank":false}
- {"value":20,"blank":false}
- {"value":22,"blank":true}
- {"value":24,"blank":false}
- {"value":26,"blank":false}
- {"value":28,"blank":false}
- {"value":30,"blank":false}
Find the missing number on the number line (20 to 47, step 2)
Show answer
Answer: 20
- Start
- 20
- End
- 47
- Step
- 2
- Markers
- {"value":20,"blank":true}
- {"value":22,"blank":false}
- {"value":24,"blank":false}
- {"value":26,"blank":false}
- {"value":28,"blank":false}
- {"value":30,"blank":false}
- {"value":32,"blank":false}
- {"value":34,"blank":false}
- {"value":36,"blank":false}
- {"value":38,"blank":false}
- {"value":40,"blank":false}
- {"value":42,"blank":false}
- {"value":44,"blank":false}
- {"value":46,"blank":false}
Find the missing number on the number line (2 to 13, step 2)
Show answer
Answer: 12
- Start
- 2
- End
- 13
- Step
- 2
- Markers
- {"value":2,"blank":false}
- {"value":4,"blank":false}
- {"value":6,"blank":false}
- {"value":8,"blank":false}
- {"value":10,"blank":false}
- {"value":12,"blank":true}
- 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="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 orangePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f9e1","name":"heart-orange","count":1,"role":"badge"}]
Find the missing number on the number line (8 to 15, step 4)
Show answer
Answer: 12
- Start
- 8
- End
- 15
- Step
- 4
- Markers
- {"value":8,"blank":false}
- {"value":12,"blank":true}
- 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 (1 to 6, step 2)
Show answer
Answer: 3
- Start
- 1
- End
- 6
- Step
- 2
- Markers
- {"value":1,"blank":false}
- {"value":3,"blank":true}
- {"value":5,"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="#E75A70" d="M19.146 26.361c-.63.901-1.637.884-2.236-.038L6.09 9.677C5.491 8.754 5.9 8 7 8h23c1.1 0 1.483.737.854 1.639L19.146 26.361z"/></g></svg>AltText: down trianglePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f53b","name":"down-triangle","count":1,"role":"badge"}]
Find the missing number on the number line (16 to 44, step 3)
Show answer
Answer: 40
- Start
- 16
- End
- 44
- Step
- 3
- Markers
- {"value":16,"blank":false}
- {"value":19,"blank":false}
- {"value":22,"blank":false}
- {"value":25,"blank":false}
- {"value":28,"blank":false}
- {"value":31,"blank":false}
- {"value":34,"blank":false}
- {"value":37,"blank":false}
- {"value":40,"blank":true}
- {"value":43,"blank":false}
Find the missing number on the number line (1 to 15, step 1)
Show answer
Answer: 13
- Start
- 1
- End
- 15
- Step
- 1
- Markers
- {"value":1,"blank":false}
- {"value":2,"blank":false}
- {"value":3,"blank":false}
- {"value":4,"blank":false}
- {"value":5,"blank":false}
- {"value":6,"blank":false}
- {"value":7,"blank":false}
- {"value":8,"blank":false}
- {"value":9,"blank":false}
- {"value":10,"blank":false}
- {"value":11,"blank":false}
- {"value":12,"blank":false}
- {"value":13,"blank":true}
- {"value":14,"blank":false}
- {"value":15,"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="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 purplePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f49c","name":"heart-purple","count":1,"role":"badge"}]
Find the missing number on the number line (14 to 42, step 2)
Show answer
Answer: 40
- Start
- 14
- End
- 42
- Step
- 2
- Markers
- {"value":14,"blank":false}
- {"value":16,"blank":false}
- {"value":18,"blank":false}
- {"value":20,"blank":false}
- {"value":22,"blank":false}
- {"value":24,"blank":false}
- {"value":26,"blank":false}
- {"value":28,"blank":false}
- {"value":30,"blank":false}
- {"value":32,"blank":false}
- {"value":34,"blank":false}
- {"value":36,"blank":false}
- {"value":38,"blank":false}
- {"value":40,"blank":true}
- {"value":42,"blank":false}
Find the missing number on the number line (22 to 28, step 4)
Show answer
Answer: 22
- Start
- 22
- End
- 28
- Step
- 4
- Markers
- {"value":22,"blank":true}
- {"value":26,"blank":false}
Find the missing number on the number line (6 to 11, step 4)
Show answer
Answer: 6
- Start
- 6
- End
- 11
- Step
- 4
- Markers
- {"value":6,"blank":true}
- {"value":10,"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="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 greenPlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f49a","name":"heart-green","count":1,"role":"badge"}]
Find the missing number on the number line (8 to 32, step 2)
Show answer
Answer: 8
- Start
- 8
- End
- 32
- Step
- 2
- Markers
- {"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}
- {"value":22,"blank":false}
- {"value":24,"blank":false}
- {"value":26,"blank":false}
- {"value":28,"blank":false}
- {"value":30,"blank":false}
- {"value":32,"blank":false}
Find the missing number on the number line (17 to 26, step 1)
Show answer
Answer: 26
- Start
- 17
- End
- 26
- Step
- 1
- Markers
- {"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":true}
Find the missing number on the number line (19 to 36, step 3)
Show answer
Answer: 31
- Start
- 19
- End
- 36
- Step
- 3
- Markers
- {"value":19,"blank":false}
- {"value":22,"blank":false}
- {"value":25,"blank":false}
- {"value":28,"blank":false}
- {"value":31,"blank":true}
- {"value":34,"blank":false}
Find the missing number on the number line (17 to 28, step 1)
Show answer
Answer: 21
- Start
- 17
- End
- 28
- Step
- 1
- Markers
- {"value":17,"blank":false}
- {"value":18,"blank":false}
- {"value":19,"blank":false}
- {"value":20,"blank":false}
- {"value":21,"blank":true}
- {"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}
Find the missing number on the number line (21 to 41, step 1)
Show answer
Answer: 34
- Start
- 21
- End
- 41
- Step
- 1
- Markers
- {"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":true}
- {"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}
Find the missing number on the number line (14 to 32, step 1)
Show answer
Answer: 17
- Start
- 14
- End
- 32
- Step
- 1
- Markers
- {"value":14,"blank":false}
- {"value":15,"blank":false}
- {"value":16,"blank":false}
- {"value":17,"blank":true}
- {"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":false}
- {"value":28,"blank":false}
- {"value":29,"blank":false}
- {"value":30,"blank":false}
- {"value":31,"blank":false}
- {"value":32,"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 Medium 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.