<span>In order to add and subtract fractions, we must be able to find a <u>common denominator</u>.
The LCD, or least common denominator, is the LCM of the denominators. Once we've added, subtracted or multiplied fractions, we often have to simplify the fraction.
In order to do this, we divide the numerator and denominator by their GCF. This means we must be able to find the LCM and GCF in order to work with fractions.</span>
Answer:d
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its easy money
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and yeah ikr I don't understand why
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69,78!!
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Espero te sirva
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Cant you just type that in the calculator 18 times lol
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use a calculator