Math 076 Chapter 4.5: Adding & Subtracting Mixed Numbers

Math 076 – Chapter 4.5: Adding & Subtracting Mixed Numbers | Carmen Does Math In this lesson we add and subtract mixed numbers two ways: 1) Convert to improper fractions, get a common denominator, then change back to a mixed number. 2) Keep the whole numbers and fractions separate, then combine (including when you need to borrow). We finish with word problems and the key words that tell you whether to add or subtract ("in all," "how much more," "cut off," "remain"). Pause the video and try each problem before I work it out! Chapters 0:00 Intro 0:02 Mixed numbers to improper fractions: 2 1/4 + 3 1/2 2:54 Method 2, whole numbers separate: 5 2/3 − 2 1/6 4:30 Practice: 4 1/5 + 1 3/10 5:39 Practice: 1 2/3 + 5 5/6 7:09 Subtraction with improper fractions: 10 1/4 − 6 5/12 9:10 Same problem with whole numbers and borrowing 11:08 Word problems: key words for adding and subtracting 11:15 Carpenter problem (setup) 11:52 Recipe problem: 2 1/3 − 1 1/2 cups 13:52 Recipe problem, the other way 15:52 Try it yourself: cutting a board Math 076 (Prealgebra), Bellevue College. #math #prealgebra #fractions #mixednumbers #CarmenDoesMath