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by multiplying any single thing by either (1/1, 2/2, 3/3, 4/4, etc.). If you have any fraction, say (1/2), and multiply it by any fraction with form (n/n) you will have the same number, just in a different form. (1/2 * 2/2) = (2/4) = (1/2)
BECAUSE: 2/2 = 1/1 = 3/3 = 4/4.
So to get like denominators with:
(1/2) + (3/8)
you just multiply (1/2) by (4/4) to get (4/8)
esentially you're multiplying 1/2 by 1, but (4/8) is easier to add to (3/8), which equals (7/8).
If you have something more complicated like:
(3/5) + (1/4)
since neither of the fractions is a multiple of the other, a simple procedure is to "CROSS MULTIPLY" which has you multiply both the numerators of either fraction by the other's denominator, then multiplying the denominators together.
essentially you're multiplying both fractions by (1/1, 2/2, 3/3, etc.).
((3/5)*(4/4)) + ((1/4)*(5/5))
which turns into
(12/20) + (5/20) = (17/20)
Wiki User
∙ 13y ago
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How can you use a model to subtract fractions with like denominators?
No. You just have to change it so the denominators are the same, and then it's easy from there!
Why are two fractions converted into like fractions?
Because you can't add or subtract fractions that have different denominators. Making them like fractions, by multiplying so the denominators are the same, you can add and/or subtract them.
What are characteristics of like fractions?
They have the same denominators
What do you notice about the denominator when subtracting like fractions?
By the definition of like fractions, the denominators are the same.
What do like and unlike fractions mean?
Like fractions have the same denominators (bottom part of fraction), unlike fractions do not.
How can you use a model to subtract fractions with like denominators?
No. You just have to change it so the denominators are the same, and then it's easy from there!
What are the like fraction?
Like fractions are fractions with the same denominators.
When fractions have like denominators the larger the what the larger the fraction?
When you have fractions with like denominators, the larger is the one with the larger numerator.
What the difference between like and unlike fraction?
fractions having same denominators are like fractions & others are unlike fractions
How is adding like fractions and adding unlike fractions the same?
If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.
Why are two fractions converted into like fractions?
Because you can't add or subtract fractions that have different denominators. Making them like fractions, by multiplying so the denominators are the same, you can add and/or subtract them.
Explain how comparing fractions with like denominators differs from comparing fractions with unlike denominators?
Because when you compare fractions with the same denominators, you do not have to find the least common denominator (LCM or LCD).
When adding fractions with like denominators how do you convert?
When adding fractions with like denominators, add the numerators together and put the result over the denominator. Simplify if possible.
What way is subracting fractions with unlike denominators like adding fractions with unlike denominators?
If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators.
How do you change fractions into desimals?
You change fractions into decimals by dividing their denominators into their numerators as for example 3/4 = 0.75
When you are multiplying fractions do you need like denominators?
No.
What are characteristics of like fractions?
They have the same denominators
