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# Fractions webinar

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Fraction computations.

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### Fractions webinar

1. 1. Stephen Barnett<br />Fractions<br />
2. 2.
3. 3. Fractions<br />Did you know that 5 out of every 4 students have trouble with fractions?!?!?<br />Wait…..does that make sense??<br />Sometimes fractions can be confusing, let’s look at how to work with fractions.<br />Fractions<br />
4. 4. Numerator<br />Denominator<br />Fractions<br />
5. 5. Numerator<br />Denominator<br />Four equal parts, so the denominator is four.<br />We only have one unit of these equal parts, so the numerator is one.<br />Fractions<br />
6. 6. Numerator<br />Denominator<br />Four equal parts, so the denominator is four.<br />We only have two units of these equal parts, so the numerator is two.<br />Fractions<br />
7. 7. Numerator<br />Denominator<br />Four equal parts, so the denominator is four.<br />We only have three units of these equal parts, so the numerator is three.<br />Fractions<br />
8. 8. Numerator<br />Denominator<br />Four equal parts, so the denominator is four.<br />We have fours units of these equal parts, so the numerator is four.<br />Fractions<br />
9. 9. Interesting Fractions<br />Fractions<br />
10. 10. Simplifying Fractions<br />Factor the numerator<br />Factor the denominator<br />See if anything cancels to one<br />Simplify 1015<br /> <br />Simplify 8𝑥20𝑥<br /> <br />Simplify 280960<br /> <br />Simplify −1824<br /> <br />Fractions<br />
11. 11. Multiplying Fractions<br />Multiply straight across<br />Simplify<br />34∙89<br /> <br />3𝑥10∙215𝑥<br /> <br />Fractions<br />
12. 12. Dividing Fractions<br />Change the problem to multiplication using the reciprocal<br />Multiply straight across<br />The reciprocal of a number is found by switching the numerator and denominator of the number<br />Find the reciprocal of the following numbers:<br />1.) 12<br />2.) 56<br />3.) 7<br /> <br />Fractions<br />
13. 13. Dividing Fractions<br />To divide by a fraction, we multiple by its reciprocal.<br />Fractions<br />
14. 14. Adding or Subtracting Fractions<br />If the denominators of the two fractions are the SAME, add or subtract the numerators and keep the same denominator.<br />57 −37<br /> <br />Fractions<br />
15. 15. Adding or Subtracting Fractions<br />If the denominators of the two fractions are DIFFERENT, we need to find the least common multiple (LCM) of the two denominators. <br />This is called the least common denominator (LCD).<br />Find the LCM of <br />Fractions<br />
16. 16. Adding or Subtracting Fractions<br />Now add the following fractions.<br />Subtract: 45 −13<br /> <br />Fractions<br />
17. 17. Mixed numbers<br /><ul><li>Numbers represented by a whole number and fraction.</li></ul>223<br />  545 <br /> <br />Fractions<br />
18. 18. Subtracting with Mixed Numbers<br />527−312<br /> <br />Fractions<br />
19. 19. Subtracting with Mixed Numbers<br />223−615<br /> <br />Fractions<br />
20. 20. Question and Answer<br />If you have any additional questions on solving an equation or on any other math concept following the webinar, please feel free to contact any of the math specialists in the Success Center for assistance.<br />Lisa Johnson Ext 1411 or lisa.johnson@columbiasouthern.edu<br />Stephen Barnett Ext 1428 or stephen.barnett@columbiasouthern.edu<br />Jonathan Byrd Ext 1215 or jonathan.byrd@columbiasouthern.edu<br />Clarice Ferolito Ext 1496 or clarice.ferolito@columbiasouthern.edu<br />Echelon Method<br />
21. 21. Practice<br />