https://www.khanacademy.org/math/cc-fifth-grade-math/imp-fractions-3/imp-adding-and-subtracting-fractions-with-unlike-denominators/v/adding-small-fractions-with-unlike-denominators 2026-03-10T04:40:42.349852002Z Adding fractions with unlike denominators Learn how to add two fractions with different denominators. It can be challenging to combine fractions when the denominators don't match. It is important to find a common denominator. Finally, the resource shows how to find a common multiple of the two denominators in order to convert the fractions so they can be added together. video https://cdn.kastatic.org/googleusercontent/EeHR_uZPZlXZKP-3VZDsOr8WFeKnUgKKFjTnaea8kP3aWG5vjjT1bydR9QDybgSCxJB51sQSRgHJFbkYIvlgJIGX Adding fractions with unlike denominators Learn how to add two fractions with different denominators. It can be challenging to combine fractions when the denominators don't match. It is important to find a common denominator. Finally, the resource shows how to find a common multiple of the two denominators in order to convert the fractions so they can be added together. https://cdn.kastatic.org/ka-youtube-converted/bcCLKACsYJ0.mp4/bcCLKACsYJ0.mp4 444 Rational Numbers https://www.khanacademy.org/math/cc-fifth-grade-math/imp-fractions-3/imp-adding-and-subtracting-fractions-with-unlike-denominators/v/subtracting-small-fractions-with-unlike-denominators 2022-11-16T04:22:43.7414897Z Subtracting fractions with unlike denominators To subtract fractions with different denominators, you need to find a common denominator. This can be done by identifying the least common multiple of the two denominators. After rewriting the fractions so they both have the common denominator, you can subtract the numerators as you would with any two fractions. video https://cdn.kastatic.org/googleusercontent/bXhENKEsU2-HJYbsZd2b6Ft3n_R060Q01MPUr3QKFY85ubU1Q6N5weJBzV4jJDcyXxXJtBUYZ3Z8wkbhdHitPcVN6Q Subtracting fractions with unlike denominators To subtract fractions with different denominators, you need to find a common denominator. This can be done by identifying the least common multiple of the two denominators. After rewriting the fractions so they both have the common denominator, you can subtract the numerators as you would with any two fractions. https://cdn.kastatic.org/ka-youtube-converted/2DPivVFCdqA.mp4/2DPivVFCdqA.mp4 301 Rational Numbers https://www.khanacademy.org/math/arithmetic-home/arith-review-fractions/multiply-fractions/v/multiplying-a-fraction-by-a-fraction 2021-07-02T09:35:27Z Intro to multiplying 2 fractions Sal introduces multiplying 2 fractions.  Sal Khan video https://cdn.kastatic.org/googleusercontent/-apXkAC4R8ub-qrpgOq2qJQV7Ujyzp4neYGs9nuB3GOxfthXKwi3pR-Khk75De-EfWwrtIho1Uq2QxEABuOQCT6CHw Intro to multiplying 2 fractions Sal introduces multiplying 2 fractions.  https://cdn.kastatic.org/ka-youtube-converted/x6xtezhuCZ4.mp4/x6xtezhuCZ4.mp4 306 Rational Numbers https://www.khanacademy.org/math/cc-third-grade-math/3rd-basic-multiplication/distributive-property/v/using-the-distributive-property-when-multiplying 2022-10-06T09:25:13.606060383Z Distributive property when multiplying Sal uses the distributive property to break up 4x7 into smaller numbers. video https://cdn.kastatic.org/ka_thumbnails_cache/daa50cc3-754a-4c62-8ae4-4477b64035ed_1280_720_base.png Distributive property when multiplying Sal uses the distributive property to break up 4x7 into smaller numbers. https://cdn.kastatic.org/ka-youtube-converted/zRgnVbh6psI.mp4/zRgnVbh6psI.mp4 369 Rational Numbers https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-arithmetic-operations/cc-6th-dividing-fractions/v/conceptual-understanding-of-dividing-fractions-by-fractions 2023-04-26T09:17:19.896568581Z Understanding division of fractions Dividing fractions can be understood using number lines and jumps. To divide a fraction like 8/3 by another fraction like 1/3, count the jumps of 1/3 needed to reach 8/3. Alternatively, multiply 8/3 by the reciprocal of the divisor (3/1) to get the same result. This concept applies to other fractions, such as dividing 8/3 by 2/3. Sal Khan video https://cdn.kastatic.org/googleusercontent/Q6ASbQmSOuXJNWk0IGjFBku1VECkZX-lMPQbzl_3VRyuPGzXtOcFLw49A8NDUCF_i4DeoXz6W90G9ftgsHT2peo Understanding division of fractions Dividing fractions can be understood using number lines and jumps. To divide a fraction like 8/3 by another fraction like 1/3, count the jumps of 1/3 needed to reach 8/3. Alternatively, multiply 8/3 by the reciprocal of the divisor (3/1) to get the same result. This concept applies to other fractions, such as dividing 8/3 by 2/3. https://cdn.kastatic.org/ka-youtube-converted/f3ySpxX9oeM.mp4/f3ySpxX9oeM.mp4 342 Rational Numbers https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-fractions-decimals/cc-7th-fracs-to-decimals/v/converting-fractions-to-decimals-ex2 2021-06-28T22:10:43Z Fraction to decimal: 11/25 Sal writes 11/25 as a decimal. Sal Khan video https://cdn.kastatic.org/googleusercontent/zETmBdJQ66in-cPUWpYLJFxPJqupgHKpML-jlT83G5tlG0GNFX1B5h_qJ81XUwbjX2Xt9WVONJxUaDCQWRx5Xjv9Kg Fraction to decimal: 11/25 Sal writes 11/25 as a decimal. https://cdn.kastatic.org/ka-youtube-converted/sCVyvfOLI6U.mp4/sCVyvfOLI6U.mp4 93 Rational Numbers https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-repeating-decimals/v/converting-a-fraction-to-a-repeating-decimal 2023-07-17T20:04:18.610848495Z Converting a fraction to a repeating decimal To convert a fraction like 19/27 into a decimal, you should divide 27 into 19, and use the remainder to figure out the decimal. The decimal begins 0.703703..., and the notation for a repeating decimal like this is to write the numbers that repeat and then put a line above them. The first six digits of the decimal should be included in the answer. Sal Khan video https://cdn.kastatic.org/googleusercontent/NVyuuWSvwxfY-Xr_n6iAspQY4wujrE7zremxpkhxsER33ixHW-eC6c__YxpxMvfHuEVsv0KhgEIQdltGopy0jApLeg Converting a fraction to a repeating decimal To convert a fraction like 19/27 into a decimal, you should divide 27 into 19, and use the remainder to figure out the decimal. The decimal begins 0.703703..., and the notation for a repeating decimal like this is to write the numbers that repeat and then put a line above them. The first six digits of the decimal should be included in the answer. https://cdn.kastatic.org/ka-youtube-converted/Y2-tz27nKoQ.mp4/Y2-tz27nKoQ.mp4 265 Rational Numbers https://www.khanacademy.org/math/cc-fourth-grade-math/imp-decimals/imp-converting-decimals-to-fractions/v/converting-decimals-to-fractions-1-ex-3 2021-06-11T15:13:40Z Rewriting decimals as fractions: 0.36 Sal converts 0.36 to a fraction. Sal Khan video https://cdn.kastatic.org/googleusercontent/xgVhDxufJMcjmXB9QMz0dyHcg1WkTlKCgeh5Ms0pCY0aabGoP3h4RHTcEwyAyqyQG1dEXiHBwu3O_6Rt4mvjI0dMVg Rewriting decimals as fractions: 0.36 Sal converts 0.36 to a fraction. https://cdn.kastatic.org/ka-youtube-converted/OS1g4PDdNdM.mp4/OS1g4PDdNdM.mp4 74 Rational Numbers https://www.khanacademy.org/math/revision-up-math-class-8/xe4edb0d90ad0a387:week-1-revision-up-math-class-8/xe4edb0d90ad0a387:rational-numbers-revision-up-math-class-8/e/revision-rational-numbers-up-math-class-8 2025-01-28T11:26:50.117543146Z Revision Rational Numbers Practice problems for revision of Rational Numbers. Satya Swaroop exercise