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Number Line: Number Pairs [TEKS Tools Grade 4]

This post specifically looks at how number lines can be used to explore number pair relationships in real-world scenarios. Read more about TEKS Tools and their rationale here.


Number Pairs

Number lines, the second TEKS Tool, account for around 20% of each 4th grade STAAR test. Within this tool are many uses: representing and comparing fractions, interpreting number pair relationships, and solving problems involving rounding and the operations.


The main function of a number line is to show the relationship between fractional quantities, number pairs, or as a tool for rounding and estimation. By visualizing these quantities on number lines, students can better make sense of the how the quantities are related.

Number Pairs

Number pairs are the foundation of input-output tables, graphing on a coordinate plane, and proportionality. Utilizing a double number line provides a consistent tool that students can use all through high school to understand proportional relationships.


4.5B - represent problems using an input-output table and numerical expressions to generate a number pattern that follows a given rule representing the relationship of the values in the resulting sequence and their position in the sequence

Students are asked to interpret a real-world relationship and describe it in words.

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2023-7: a table is given, students have to solve for the rule

2025-14; a table is given, students have to solve for the rule

Students are also asked to interpret a real-world relationship and represent it in a table.

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2024-10: a rule was given, students had to match it to the correct tabular representation

2024-32: a rule was given, students had to match it to the correct tabular representation

4.8B - convert measurements within the same measurement system, customary or metric, from a smaller unit into a larger unit or a larger unit into a smaller unit when given other equivalent measures represented in a table

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