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10 Cards in this Set
- Front
- Back
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What is step 1 in adding fractions w/different denominators?
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Find a common denominator!
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How do you find a common denominator ot LCD?
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Do factor tree/prime factorization of the two numbers and place in a box & circle greatest amount of factors and multiply.
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If original denominators are both Prime No#- what do you do?
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Just multiply the two prime no# to find common denominator.
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What is step 2 after you find common denominator?
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Move over new common denominators and then divid by old denominators & then multiply original numerators to find equivlant fraction.
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How do you add mixed No# and fractions? 2 4/5
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Follow the same steps as adding regular fraction, just move over the numbers and add.
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How do you subtract fractions w/ same denominators?
Ex: 8/9 - 1/9= 7/9 |
Subtract the numerators and & keep the same denominator.
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How do you add fractions w/same denominators?
2/7 + 3/7 = 5/7 |
Add the numerators and keep the same denominators.
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How do you simplify after adding fractions?
Ex: 10/16 |
Write the prime factorization of numerators & denominator and then cross out all common factors up/down, then multiply left over prime no#.
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How do you compare like fractions?
Ex: 3/10 and 4/10 |
1. Find out which is the larger numerator.
2. if the first set fraction have the larger numerator then put a > between fractions. 3. if the first the first set of fraction haves a smaller numerator then put a < in between the fractions. |
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How do you compare unlike fractions?
Ex: 2/5 and 3/7 |
1. Find a common denominator then take orignal denominator and divide w/common denominator then multiply by numerator.
2. The larger/smaller numerator of common denominator will decide which sign < or >. |
