Subtracting Rational Numbers Using an Algorithm

This video tutorial teaches how to subtract rational numbers using an algorithm, without models. It reviews adding numbers with the same and opposite signs, explains rational numbers and their relation to integers, and explores patterns in arithmetic operations. The video demonstrates the equivalence of subtracting a number and adding its opposite, using examples and practice problems on a number line.

How can you verify that subtracting a number is equivalent to adding its opposite?

What is the result of negative 25 minus 75, and how can it be visualized on a number line?

When subtracting 1.5 and negative 1.25, what is the expected outcome?