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Similaire à Sec. 6.3 (20)
Sec. 6.3
- 2. BIG IDEA:YOU MUST FIND COMMON DENOMINATORSthen follow the same rules as we did when we had fractions with common denominators to begin with.
- 3. Why is it so important to find a common denominator when adding and subtracting fractions?
- 4. A: so you can truly understand the relationship between your two fractions.
- 5. To find common denominators you can either find the LCD or you can us the method below.http://www.mathsisfun.com/numbers/common-denominator.html
- 6. Video of the method described on the last slide.http://www.mathsisfun.com/numbers/common-denominator.html
- 7. Find the sum or difference.3/4 + 2/35/6 + 7/107/8 – 1/41/2 – 4/9Remember to simplify your answer.
- 8. Find the sum or difference.3/4 + 2/3 = 1 5/125/6 + 7/10 = 1 8/15 7/8 – 1/4 = 5/81/2 – 4/9 = 1/18Remember to simplify your answer.
- 12. A: Finding the perimeter of an object.CookingCarpentry workPharmacist Figuring how much gas you need to fill your gas tank.
- 13. Can you compute the actual sums and differences of fractions with different denominators?