![Page 1: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/1.jpg)
By Doug Harley
![Page 2: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/2.jpg)
“I Can’t. I simply can’t.”
Fractions are not ready to be added until they have a common denominator.
![Page 3: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/3.jpg)
Response: My Left Side
“I can’t. I simply can’t. Those fractions are not ready to be added.”
![Page 4: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/4.jpg)
Response: My Right Side
“Stop!!! Back away from those fractions. Those fractions are not ready to be added.”
![Page 5: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/5.jpg)
Objective
Without using any notes, you will be able to add and subtract fractions with unlike denominators with 90% accuracy.
![Page 6: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/6.jpg)
Least Common Denominator (LCD)
Given the fractions 1/6 and 3/8, you should be able to calculate that the LCD is 24.
![Page 7: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/7.jpg)
Building up Fractions
Given that the LCD for the fractions 1/6 and 3/8 is 24, you should be able to build up each fraction to obtain an equivalent fraction with the LCD.
1/6 = 4/24 3/8 = 9/24
![Page 8: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/8.jpg)
Adding Fractions with like Denominators
Given two fractions with like denominators, you should be able to calculate the sum of the two fractions.
4/24 + 9/24 = 13/24
![Page 9: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/9.jpg)
Subtracting Fractions with like Denominators
Given two fractions with like denominators, you should be able to calculate the difference of the two fractions.
9/24 - 2/24 = 7/24
![Page 10: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/10.jpg)
Simplifying Fractions
Given a fraction that can be reduce, you should be able to reduce the fraction.
12/15 = 4/5
![Page 11: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/11.jpg)
Adding Fractions with unlike Denominators
Given two fractions with unlike denominators, you should be able to calculate the sum of the two fractions.
3/5 + 2/7 = 31/35
![Page 12: By Doug Harley. “I Can’t. I simply can’t.” Fractions are not ready to be added until they have a common denominator](https://reader035.vdocuments.mx/reader035/viewer/2022070403/56649f2f5503460f94c4932c/html5/thumbnails/12.jpg)
Resources
Waztamann, (2009). I simply can’t. Retrieved from: http://www.youtube.com/watch?v=Wu4onoiOzQw&feature=related