In this 5-minute video Sal Khan shows the viewer how to find the least common denominator with the fractions 2/8 and 5/6. Mr. Khan of Khan Academy uses computer software for demonstration.
Finding Common Denominators is a free educational video by Khan Academy.It helps students in grades 5 practice the following standards 4.nf.a.2.
1. 4.nf.a.2 : Compare two fractions with different numerators and different denominators, e.g., by creating common denominators or numerators, or by comparing to a benchmark fraction such as 1/2. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with symbols >, =, or <, and justify the conclusions, e.g., by using a visual fraction model. (Grade 4 expectations in this domain are limited to fractions with denominators 2, 3, 4, 5, 6, 8, 10, 12, and 100.).
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