Which mathematical concept is addressed through the use of both Cuisenaire rods and decimal squares?

The correct answer is that the mathematical concept addressed through the use of both Cuisenaire rods and decimal squares is place value.

Cuisenaire rods and decimal squares are effective tools for visualizing and understanding place value, as they allow students to represent numbers in various forms. Cuisenaire rods come in different lengths and colors, each corresponding to a specific value. By arranging these rods, students can see how combinations of different lengths can be used to create numbers, which directly relates to their understanding of place value as the position of a digit affects its value.

Decimal squares are designed to represent fractions and decimals visually, where each square can demonstrate parts of a whole. They help students grasp the concept of place value by visually separating units, tenths, hundredths, and so on. This visualization reinforces how numbers are structured in our base ten system.

While fractions, counting, and measurement are foundational mathematical concepts, they do not specifically address the positional value of numbers in a base-ten system as effectively as place value does with these tools. Therefore, the use of Cuisenaire rods and decimal squares aligns more closely with teaching the understanding of place value.