A learner interprets a number line as an ordered representation of whole numbers, using equally spaced tick marks and the counting sequence to determine an unknown number within familiar ranges such as 0–100. They reason forward or backward from known labels, attend to the interval between marks, and understand that a missing number has a fixed position rather than being guessed from nearby digits; fractional, negative, and substantially larger-number scales are not included.
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Detailed Explanation: Find missing numbers on a number line
Look at the tick marks on the number line. The marks are equally spaced, so each step shows the next whole number.
Example:
0 1 2 ? 4 5 6
|-----|-----|-----|-----|-----|-----|
- Find a number you know. The missing mark comes just after .
- Count forward one number: .
- The mark after the missing mark is , which confirms the missing number is .
So, the missing number is .
Learn by doing: Find missing numbers on a number line
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Practice:
Number Line - Positive Integers, Select Dot - From Ticks
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Download/Modify Free Grade 1 'Find missing numbers on a number line' Worksheet
Print this free 'Find missing numbers on a number line' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Number Line - Positive Integers, Select Dot - From Ticks
- Number Line - Positive Integers, Read Number - From Ticks
- Number Chart to 100 - Next/Previous Number (within five, below 20)
- Number Chart to 100 - Next/Previous Number (within five, below 50)
- Number Chart to 100 - Next/Previous Number (within five, below 100)
- Number Chart to 100 - Next/Previous Number (one, below 50)
- Number Chart to 100 - Next/Previous Number (one, below 20)
- Number Chart to 100 - Next/Previous Number (one, below 100)
Units Teaching This Skill
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