The simplest answer is that you can get the right answer without it.
Example: 1/2 x 1/4
That means you're going to split 1/4 into two parts and keep one of the parts.
I/2 of 1/4 is 1/8
You can get the same answer with common denominators.
2/4 x 1/4 = 2/16 = 1/8
But it's not necessary to do the extra step.
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I dont know
You dont really, well at least in my years of knowledge
One way you can subtract fractions is to change them into decimals, aligning the decimals vertically, then subtracting like you would with whole numbers, making sure to carry down the decimal. Another way that you can subtract fractions is to use the least common denominator (lcd). First, simplify the fractions. Then find the multiples of the denominators. When you find the multiple included in both lists that is the least, multiply the numerator and denominator by the same number in order to make the denominator into the lcd. Then, subtract the numerators and simplify the answer. Example: 2/3 - 1/2 = 4/6 - 3/6 = 1/6
that they dont looks like them
I dont know the answer