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Why do you use LCD to solve the addition and subtraction fractions?
Wiki User
∙ 11y ago
Because you can't add or subtract fractions unless they have the same denominator,
so when you run up against two fractions with different denominators, you have to
find a single denominator that works for both of them. There are an infinite number
of common denominators that you could use, but the easiest one to handle without
making mistakes is going to be the smallest one, so it's worth knowing how to find it.
Wiki User
∙ 11y ago
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When doing fractions why is it easier to multiply and divide fractions than add and substract fractions?
It is easier to multiply or divide fractions than to add or subtract fractions because in multiplication, you just have to multiply the numerator by the numerator and the denominator by the denominator. Same applies with division of fractions, except that you have to reciprocate the fraction you're dividing with (divisor) then proceed to multiplication. Whereas, in addition and subtraction of fractions, you still have to get their Least Common Denominator (LCD).
What is the LCD for fractions?
The LCD for fractions is the LCM (least common multiple) of all of the denominators.
How do you minus mix numbers?
You first convert the numbers into top-heavy fractions, then solve like a normal fraction (e.g. LCD, then subtract).
When is it useful to know multiples of a number?
When reducing fractions to their lowest terms or finding the LCD of fractions
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.
How do you eliminate the fractions of LCd?
This can be done in an equation only. Multiply the entire equation by the LCD. This cancels every denominator leaving an equation with no fractions. EX: x/3 + 2/5 = 3/4 so the LCD for 3,5, and 4 is 60 60(x/3) + 60(2/5) = 60(3/4) 20(x) + 12(2) = 15(3) no more fractions, just solve.
What is the algorithm for adding fractions?
LCD
How the LCD of two or more fractions could be of use?
Once you find the LCD, convert the fractions to their equivalents and then you can add and/or subtract them correctly.
Express the fractions of 34 76 and 58 with the lcd?
how do u exspress fractions how do u exspress fractions
What is the purpose of finding the LCD of fractions?
because.
The lcd for the fractions 12 34?
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What is the LCD of 14 over 15?
You need at least two fractions to find an LCD.
