How does Module 4 address the understanding of the number system?

The focus on emphasizing operations with rational numbers is crucial in understanding the number system because it equips students with the skills to work with both fractions and decimals, which are fundamental aspects of rational numbers. By engaging with operations such as addition, subtraction, multiplication, and division of rational numbers, learners can develop a deeper comprehension of number relationships, proportional reasoning, and comparative size. This foundational knowledge not only enhances arithmetic skills but also prepares students for more complex mathematical concepts that incorporate irrational numbers and real numbers in future learning. Engaging with rational numbers allows students to see their application in everyday life, further solidifying their understanding of the number system as a whole.