Visual Representation: The use of a number line with tens and units provides a visual representation of place value, making abstract concepts more concrete for students. Each position on the number line corresponds to a specific place value, allowing students to see the relationship between tens and units and their positions within a number. This visual aid helps learners develop a clearer mental image of the numerical structure, aiding in their understanding of how digits contribute to the overall value of a number.

Sequential Understanding: A number line with tens and units helps students build a sequential understanding of place value. As they move along the number line, they can observe the incremental change in the tens and units positions. This sequential representation facilitates the comprehension of the order and magnitude of numbers, promoting a foundational understanding of the base-ten number system. Students can physically or mentally move along the line, reinforcing the concept of counting by tens and ones.

Conceptual Bridge to Addition and Subtraction: The use of a number line with tens and units serves as a conceptual bridge to addition and subtraction. Students can visually represent and practice these operations by hopping or marking positions on the number line. Understanding the place value relationships allows them to decompose numbers into tens and units, facilitating mental math strategies. The number line becomes a dynamic tool for demonstrating the regrouping process in addition and subtraction, helping students grasp the mechanics of these operations in a meaningful way.