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"*does this seem like a formula to you?
*does this seem like a formula to you?
最后更新： 2016-03-03
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3/4-2/4= 1/4 if the denominators are different, we have to find the lowest common denominator and express the equivalent fractions, to be able to subtract them. for example: 2/3-4/5 as we saw before, their lowest common denominator is 15, and the equivalent fractions are 10/15 and 12/15. so we have: 2/3-4/5= 10/15- 12/15 finally, we can subtract the numerators to get our result: 2/3 - 4/5 = 10/15 - 12/15 = -2/15 let us see another example: 6/5-7/8 their lowest common denominator is 5 * 8 = 40, and the equivalent fractions are calculated in the following way. to convert 6/5 in an equivalent fraction with 40 in the denominator, we have to consider that the denominator has been multiplied by 8 in this case, passing from 5 to 40, so the numerator must be mulliplied by 8 too: 6 * 8 = 48 -> new first fraction is 48/40. and to convert 7/8 in an equivalent fraction with 40 in the denominator, we have to consider that the denominator has been multiplied by 5 in this case, passing from 8 to 40, so the numerator must be multiplied by 5 too: 7 * 5 = 35 new second fraction is 35/40.
最后更新： 2021-03-10
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