Workbook Detail
Number Line 1 20 Starter — Set 4
Find the missing number on the number line (12 to 24, step 3)
Show answer
Answer: 18
- Start
- 12
- End
- 24
- Step
- 3
- Markers
- {"value":12,"blank":false}
- {"value":15,"blank":false}
- {"value":18,"blank":true}
- {"value":21,"blank":false}
- {"value":24,"blank":false}
Find the missing number on the number line (23 to 29, step 2)
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Answer: 23
- Start
- 23
- End
- 29
- Step
- 2
- Markers
- {"value":23,"blank":true}
- {"value":25,"blank":false}
- {"value":27,"blank":false}
- {"value":29,"blank":false}
Find the missing number on the number line (10 to 35, step 3)
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Answer: 28
- Start
- 10
- End
- 35
- Step
- 3
- Markers
- {"value":10,"blank":false}
- {"value":13,"blank":false}
- {"value":16,"blank":false}
- {"value":19,"blank":false}
- {"value":22,"blank":false}
- {"value":25,"blank":false}
- {"value":28,"blank":true}
- {"value":31,"blank":false}
- {"value":34,"blank":false}
Find the missing number on the number line (6 to 25, step 1)
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Answer: 24
- Start
- 6
- End
- 25
- Step
- 1
- Markers
- {"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":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":true}
- {"value":25,"blank":false}
Find the missing number on the number line (3 to 13, step 3)
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Answer: 3
- Start
- 3
- End
- 13
- Step
- 3
- Markers
- {"value":3,"blank":true}
- {"value":6,"blank":false}
- {"value":9,"blank":false}
- {"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)"><circle fill="#F4900C" cx="18" cy="18" r="18"/></g></svg>AltText: orange circlePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f7e0","name":"orange-circle","count":1,"role":"badge"}]
Find the missing number on the number line (15 to 38, step 3)
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Answer: 15
- Start
- 15
- End
- 38
- Step
- 3
- Markers
- {"value":15,"blank":true}
- {"value":18,"blank":false}
- {"value":21,"blank":false}
- {"value":24,"blank":false}
- {"value":27,"blank":false}
- {"value":30,"blank":false}
- {"value":33,"blank":false}
- {"value":36,"blank":false}
Find the missing number on the number line (12 to 37, step 1)
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Answer: 17
- Start
- 12
- End
- 37
- Step
- 1
- Markers
- {"value":12,"blank":false}
- {"value":13,"blank":false}
- {"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}
- {"value":33,"blank":false}
- {"value":34,"blank":false}
- {"value":35,"blank":false}
- {"value":36,"blank":false}
- {"value":37,"blank":false}
Find the missing number on the number line (14 to 26, step 2)
Show answer
Answer: 14
- Start
- 14
- End
- 26
- Step
- 2
- Markers
- {"value":14,"blank":true}
- {"value":16,"blank":false}
- {"value":18,"blank":false}
- {"value":20,"blank":false}
- {"value":22,"blank":false}
- {"value":24,"blank":false}
- {"value":26,"blank":false}
Find the missing number on the number line (20 to 33, step 4)
Show answer
Answer: 32
- Start
- 20
- End
- 33
- Step
- 4
- Markers
- {"value":20,"blank":false}
- {"value":24,"blank":false}
- {"value":28,"blank":false}
- {"value":32,"blank":true}
Find the missing number on the number line (7 to 30, step 4)
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Answer: 11
- Start
- 7
- End
- 30
- Step
- 4
- Markers
- {"value":7,"blank":false}
- {"value":11,"blank":true}
- {"value":15,"blank":false}
- {"value":19,"blank":false}
- {"value":23,"blank":false}
- {"value":27,"blank":false}
Find the missing number on the number line (22 to 44, step 2)
Show answer
Answer: 44
- Start
- 22
- End
- 44
- Step
- 2
- Markers
- {"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":true}
Find the missing number on the number line (14 to 35, step 4)
Show answer
Answer: 22
- Start
- 14
- End
- 35
- Step
- 4
- Markers
- {"value":14,"blank":false}
- {"value":18,"blank":false}
- {"value":22,"blank":true}
- {"value":26,"blank":false}
- {"value":30,"blank":false}
- {"value":34,"blank":false}
Find the missing number on the number line (14 to 43, step 2)
Show answer
Answer: 18
- Start
- 14
- End
- 43
- Step
- 2
- Markers
- {"value":14,"blank":false}
- {"value":16,"blank":false}
- {"value":18,"blank":true}
- {"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":false}
- {"value":42,"blank":false}
Find the missing number on the number line (24 to 50, step 1)
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Answer: 39
- Start
- 24
- End
- 50
- Step
- 1
- Markers
- {"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":true}
- {"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":false}
- {"value":49,"blank":false}
- {"value":50,"blank":false}
Find the missing number on the number line (11 to 33, step 1)
Show answer
Answer: 31
- Start
- 11
- End
- 33
- Step
- 1
- Markers
- {"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":false}
- {"value":28,"blank":false}
- {"value":29,"blank":false}
- {"value":30,"blank":false}
- {"value":31,"blank":true}
- {"value":32,"blank":false}
- {"value":33,"blank":false}
Find the missing number on the number line (4 to 22, step 2)
Show answer
Answer: 22
- Start
- 4
- End
- 22
- Step
- 2
- Markers
- {"value":4,"blank":false}
- {"value":6,"blank":false}
- {"value":8,"blank":false}
- {"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":true}
Find the missing number on the number line (15 to 33, step 1)
Show answer
Answer: 24
- Start
- 15
- End
- 33
- Step
- 1
- Markers
- {"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":true}
- {"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 (10 to 15, step 3)
Show answer
Answer: 13
- Start
- 10
- End
- 15
- Step
- 3
- Markers
- {"value":10,"blank":false}
- {"value":13,"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)"><circle fill="#55ACEE" cx="18" cy="18" r="18"/></g></svg>AltText: blue circlePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f535","name":"blue-circle","count":1,"role":"badge"}]
Find the missing number on the number line (17 to 32, step 4)
Show answer
Answer: 29
- Start
- 17
- End
- 32
- Step
- 4
- Markers
- {"value":17,"blank":false}
- {"value":21,"blank":false}
- {"value":25,"blank":false}
- {"value":29,"blank":true}
Find the missing number on the number line (20 to 45, step 2)
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Answer: 44
- Start
- 20
- End
- 45
- Step
- 2
- Markers
- {"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":false}
- {"value":42,"blank":false}
- {"value":44,"blank":true}
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.
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Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.