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Why must the denominators in fractions be the same before you add them?
Wiki User
∙ 10y ago
you have to find the common factor of the two number befor adding them.
Wiki User
∙ 10y ago
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When do you need a common denominator?
The denominators must be the same before you can add or subtract fractions.
Are the steps for like and unlike denominators the same or different?
It depends what you are doing with the fractions. If you are multiplying or dividing fraction, the denominators do not need to be the same and the calculation can be carried out immediately. If you are adding or subtracting fractions, the denominators must be the same; if you have different denominators, the fractions must first be changed into equivalent fractions with the same denominator. When the denominators are the same (or have been made the same as equivalent fractions from being different) the calculation can be carried out.
How are adding fractions different?
When adding or subtracting fractions their denominators must be the same
IS THE LCD OF TWO FRACTIONS THE SAME AS THE LCM NUMERATORS AND FRACTIONS?
The LCD of two fractions is the same as the LCM of their denominators.
Why are least common denominators important?
In order to subtract or add fractions the denominators must be the same and that's why the LCD must be found.
When adding fractions do denominators change?
you must make the denominators the same first in order to add them once they are added, the denominators stay the same and the top combines
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.
In order to perform this opertation fractions must have the same denominators?
Addition or subtraction
When adding or subtracting fractions do you have to have the numerator the same or denominator?
The denominators must be the same, the numerators can be different.
Do you always have to have like numerators in fractions before you can add or subtract?
No, the denominators have to be the same.
What the difference between like and unlike fraction?
fractions having same denominators are like fractions & others are unlike fractions
Fractions Have The Same Denominators?
Not always but they need to have the same denominators when adding or subtracting them.
