On the first page, I wanted to make the connection between rational expressions and fractions explicit, so I started with a reminder of how to add and subtract fractions. The two examples were chosen deliberately; the first only required changing the denominator on one fraction, while the other required changing both denominators. Students need to deal with both types of problems with rational expressions.<\/p>\n The next part introduced two simple problems, with only one denominator being changed between them. They are both problems that require simplifying, as I wanted to emphasize the need to do this from the start. (Students had already seen how to simplify rational expressions and stating excluded values.)<\/p>\n And finally, a couple of examples putting all of this together.<\/p>\n Downloads are available here.<\/a><\/p>\n These are the notes I wrote for adding and subtracting rational expressions last year in Algebra 2. On the first page, I wanted to make the connection between rational expressions and fractions explicit, so I started with a reminder of how to add and subtract fractions. The two examples were chosen deliberately; the first only … <\/p>\n![\"\"](\"https:\/\/www.primefactorisation.com\/blog\/wp-content\/uploads\/2018\/07\/20140608_230139_Android.jpg\")
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\nThe next page was about finding the lowest common multiple. I had students use a strategy which emphasizes the definition of the LCM, having them multiply by factors so that the two expressions are the same.<\/p>\n<\/a> <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"