https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:irrational-numbers/x2f8bb11595b61c86:irrational-numbers-intro/v/introduction-to-rational-and-irrational-numbers 2023-07-28T22:13:00.844712665Z Intro to rational & irrational numbers Learn the difference between rational and irrational numbers, learn how to identify them, and discover why some of the most famous numbers in mathematics, like Pi and e, are actually irrational. Did you know that there's always an irrational number between any two rational numbers? Sal Khan video https://cdn.kastatic.org/googleusercontent/TW91vVssinJ9NoXzUVhHLxwtgBPWLaDb19VLK7IQru9kKFKuL4vfLUlA8lWl5RYhHF3ESvUlSZCJXP_xHRrLuTAMIA Intro to rational & irrational numbers Learn the difference between rational and irrational numbers, learn how to identify them, and discover why some of the most famous numbers in mathematics, like Pi and e, are actually irrational. Did you know that there's always an irrational number between any two rational numbers? https://cdn.kastatic.org/ka-youtube-converted/cLP7INqs3JM.mp4/cLP7INqs3JM.mp4 355 Real numbers https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:irrational-numbers/x2f8bb11595b61c86:irrational-numbers-intro/v/recognizing-irrational-numbers 2023-07-28T22:13:00.844712665Z Classifying numbers: rational & irrational We can write any rational number as the ratio of two integers. We cannot write irrational numbers, such as the square root of 8 and pi, in this way. Learn other forms, such as decimals, in which these types of numbers can appear. Sal Khan video https://cdn.kastatic.org/googleusercontent/4WPdubD4d1Ql_fVW2zq0QqwKQlT-eMY8Lgob9RjtvGw7KQR5Ej8FxkfSAXf25au4WtlFfBIxvdUxGYzYASLo1WII Classifying numbers: rational & irrational We can write any rational number as the ratio of two integers. We cannot write irrational numbers, such as the square root of 8 and pi, in this way. Learn other forms, such as decimals, in which these types of numbers can appear. https://cdn.kastatic.org/ka-youtube-converted/d9pO2z2qvXU.mp4/d9pO2z2qvXU.mp4 138 Real numbers https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-irrational-numbers/a/classifying-numbers-review 2023-12-11T22:13:00.981327266Z Classifying numbers review Review whole numbers, integers, rational, and irrational numbers.  Then, practice identifying each.   article https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:irrational-numbers/x2f8bb11595b61c86:irrational-numbers-intro/e/recognizing-rational-and-irrational-numbers 2025-08-19T15:33:49.112147904Z Classify numbers: rational & irrational Practice identifying whether numbers and single operation expressions are rational or irrational. Rhonda Hughes exercise https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-irrational-numbers/v/categorizing-numbers 2023-10-19T16:47:46.942023554Z Classifying numbers There are many categories we can use to classify numbers. Some of those categories are rational numbers, irrational numbers, integers, and whole numbers. Rational numbers are represented as a fraction of two integers, while irrational numbers cannot be represented as a fraction of two integers. Integers are positive and negative numbers that don’t involve fractions or decimals. Whole numbers are a subset of integers — they are non-negative integers. video https://cdn.kastatic.org/googleusercontent/u_bokzle1ONv8Qj3WVW1B2F0URky9xAV5nCCY4KlVXzBi9nLlsxBbUZcC6bmTJldHy350vk5Vlbr4bSIOTkaKetYDQ Classifying numbers There are many categories we can use to classify numbers. Some of those categories are rational numbers, irrational numbers, integers, and whole numbers. Rational numbers are represented as a fraction of two integers, while irrational numbers cannot be represented as a fraction of two integers. Integers are positive and negative numbers that don’t involve fractions or decimals. Whole numbers are a subset of integers — they are non-negative integers. https://cdn.kastatic.org/ka-youtube-converted/-QHff5pRdM8.mp4/-QHff5pRdM8.mp4 529 Real numbers https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-irrational-numbers/e/identifying-whole--integer--and-rational-numbers 2025-12-30T09:30:51.652486513Z Classify numbers Practice classifying numbers as whole, integer, rational, and irrational. Ben exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-negative-number-topic/x0267d782:ordering-rational-numbers/v/ordering-rational-numbers 2023-05-08T07:03:29.632031759Z Ordering rational numbers Learn how to order numbers from least to greatest using a number line. Convert fractions and decimals to mixed numbers or whole numbers, then plot them on the number line. Master this skill by practicing with examples like 7/3, -5/2, 0, -2, -12/4, and -3.25. video https://cdn.kastatic.org/googleusercontent/4vZhBOtU2DMKVIs_11OWaIqwJwnatAX-JmzW4BYSPcR-9412RUb0awe6jWoHhZQHlZ7baOorTvDW6va0TU1L54hR Ordering rational numbers Learn how to order numbers from least to greatest using a number line. Convert fractions and decimals to mixed numbers or whole numbers, then plot them on the number line. Master this skill by practicing with examples like 7/3, -5/2, 0, -2, -12/4, and -3.25. https://cdn.kastatic.org/ka-youtube-converted/i1i2_9wg6N8.mp4/i1i2_9wg6N8.mp4 254 Real numbers https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-negative-number-topic/x0267d782:ordering-rational-numbers/e/ordering_negative_numbers 2026-03-24T23:41:07.080866137Z Ordering rational numbers Practice putting positive and negative numbers in order. For example, -7/3, -3, and 0.37. Sid Patel exercise