Number Line: Solving Problems [TEKS Tools Grade 4]

This post specifically looks at how number lines can be used to solve a variety of problems involving rounding, estimation, and the four operations. Read more about TEKS Tools and their rationale here.

Solving Problems

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.

Fraction operations

4.3E - represent and solve addition and subtraction of fractions with equal denominators using objects and pictorial models that build to the number line and properties of operations;

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2023-29: students add fractions with equal denominators

2024-14: students add fractions with equal denominators

2025-27: students add fractions with equal denominators

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4.3F - evaluate the reasonableness of sums and differences of fractions using benchmark fractions 0, 1/4, 1/2, 3/4, and 1, referring to the same whole

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2023-16: two fractional quantities were given, students were asked to estimate the sum