Numbers are used to quantify and measure things. They can be classified into various types such as whole numbers, integers, rational numbers, and irrational numbers.

Whole numbers are the numbers 0, 1, 2, 3, 4, ... and so on. They do not include negative numbers or fractions.

Integers are the set of whole numbers and their negative counterparts, along with zero. They are represented as ..., -3, -2, -1, 0, 1, 2, 3, ...

Rational numbers are numbers that can be expressed as a ratio of two integers, where the denominator is not zero. This includes fractions and terminating or repeating decimals.

Irrational numbers cannot be expressed as a simple fraction and their decimal representation goes on forever without repeating. Examples include the square root of 2 and pi.

Real numbers include all rational and irrational numbers. They can be represented on the number line.

Complex numbers are numbers of the form a + bi, where a and b are real numbers and i is the imaginary unit (i.e., the square root of -1).

- What are whole numbers and give examples?
- Explain the concept of integers with examples.
- Differentiate between rational and irrational numbers.
- Draw and label a number line with different types of numbers.
- Simplify the expression (3 + 4i) - (2 - 5i).

Study GuideNumbers and percents Worksheet/Answer key

Numbers and percents Worksheet/Answer key

Numbers and percents Worksheet/Answer key

Numbers and percents

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Work flexibly with fractions, decimals, and percents to solve problems.

Understand and use ratios and proportions to represent quantitative relationships.

Compute fluently and make reasonable estimates.

Develop, analyze, and explain methods for solving problems involving proportions, such as scaling and finding equivalent ratios.