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Earn +20 ptsQ: What is a common denominator for 7 and 5?
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What correctly renames 7 8 and 5 6 using a common denominator?
21/24 and 20/24
What is the common denominator of 19 and 7?
It is: 133
What is one fifth plus one seventh?
1/5 + 1/7 = 12/35. TO solve, find the least common multiple or lesta common deonominator fo 5 and 7. The answer is 35. Now convert the fractions into those with a common denominator. 1/5 * 7/7 = 7/35 1/7 * 5/5 = 5/35 Now, (7+5) / 35 = 12/35, which is in simplest form.
Why do you need a common denominator to add and subtract fractions?
To get the correct answer. If you were adding 1/5 and 1/7, you might not know that the answer is 12/35 unless you knew that 1/5 = 7/35 and 1/7 = 5/35
What is 3 over 5 plus 5 over 7 as a mixed number?
The common denominator here is 35. 3/5+5/7 is 21/35+25/35. This is 46/35 or 1 and 11/35.
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