division by fraction proofI was trying to figure out the property of dividing by fraction : x a b = x ⋅ b a An other representation for this problem is to show X ÷ ( A ÷ B ) = ( X ⋅ A ) ÷ BA simple proof, is by multiplying and dividing by b a which leads to the wished result of x ⋅ b a My questions are, Is there a reason why this method of proving works? for me it seems like a "trick". A second question, do you have an other way to prove it? My searching so far led mostly to intuitive explanations about the concept of dividing.

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division by fraction proofI was trying to figure out the property of dividing by fraction :       x          a      b        =            x      ⋅      b        a  An other representation for this problem is to show   X  ÷  (  A  ÷  B  )  =  (  X  ⋅  A  )  ÷  BA simple proof, is by multiplying and dividing by       b    a   which leads to the wished result of   x  ⋅      b    a  My questions are, Is there a reason why this method of proving works? for me it seems like a &quot;trick&quot;. A second question, do you have an other way to prove it? My searching so far led mostly to intuitive explanations about the concept of dividing.

shosautesseleol · Accepted Answer

The simplest approach is to multiply the whole fraction by       b    b  , which is the same as multiplying by   1.

IJzerboor07 · Accepted Answer

After the integers one usually looks at ratios of integers, the fractions that form the rational numbers. The notation       m    n   is too cool for words! You think about how may times the integer on the bottom (denominator) goes into the top (numerator), and you now know what division is.The best part is even if you see nested fractions like      x          a      b      you can use all those same rules. There is only one way it could work, and it does work! So you just have to respect the &#039;main/first dividing line&#039; (nesting) and instead of integers you can have real or complex numbers. Darn, you can even put in polynomials!All you have to remember is       m    n    =  m      n          −      1       and the laws of numbers gives you everything you need to derive any &#039;trick&#039;. So if you want to add two fractional expressions, find a common denominator.

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