This unit builds your confidence with all types of numbers—integers, fractions, decimals, percents—and teaches you to use ratios, rates, and proportions to solve real problems. You'll also learn powerful shortcuts with exponents and scientific notation.

What You'll Learn

By the end of this unit, you'll be able to:

• Work accurately with integers and rational numbers, convert between fractions/decimals/percents, and follow order of operations
• Use ratios, rates, unit rates, and proportions to compare things fairly
• Calculate percent change, discounts, taxes, and tips
• Apply exponent laws, estimate roots, and use scientific notation for very large or small numbers

📚 Lessons

Lesson 2.1 — Integers and Rational Numbers

Master fractions, decimals, and percents. Learn to convert between them and compute accurately using order of operations.

Lesson 2.2 — Ratios, Rates, and Proportional Reasoning

Understand ratios and rates, calculate unit rates, solve proportions, and work with percent change in real-world situations like discounts and taxes.

Lesson 2.3 — Powers, Roots, and Scientific Notation

Apply exponent laws, estimate square roots, and use scientific notation to work with extremely large or small quantities efficiently.