Unlike Denominators Add and Unlike Denominators Subtract | Six Minutes: Grade 5 Math, Part 10

Six Minutes: Grade 5 Math, Part 10: Unlike Denominators Add and Unlike Denominators Subtract: Number and Operations—Fractions (5.NF.1); then Unlike Denominators Subtract Add fractions with unlike denominators by renaming both as equivalent fractions with a common denominator, then adding the numerators. Includes a worked example checked a second way and the classic mistake of adding the denominators. Then: Subtract fractions with unlike denominators by renaming both with the least common denominator, including mixed numbers. Every answer is checked a second way by converting to improper fractions. Chapters 0:00 Introduction 0:19 Same-size pieces 0:53 Worked example 1:39 The trap 2:00 Recap 2:23 Match the pieces 2:43 Find the common denominator 3:13 Mixed numbers too 3:27 Worked example 4:24 Trap 4:41 Recap 4:57 Thanks for watching Practice problems 1. Add 1/2 + 2/5. Rename with a common denominator of 10: 5/10 + 4/10 = 9/10. 2. Add 3/4 + 1/6. Rename with a common denominator of 12: 9/12 + 2/12 = 11/12. 3. A jug holds 3 1/2 liters of juice. Dev pours out 1 2/3 liters. How much is left? Answer: 1 5/6 liters. 2. 5 3/8 - 2 5/6 = ? Answer: 2 13/24. Six Minutes @SixMinuteClass: One technique, about six minutes. The narrator's voice is synthetic (computer-generated). Independent educational video. © 2026 Six Minutes · @SixMinuteClass