Is multiplication of denominators in fractions a consequence of the associativity law of multiplication?
40241
Understanding the multiplication of fractions
46010
Why don't we define division by zero as an arbritrary constant such as $j$?
96039
Why is $\frac {1\cdot2\cdot3\cdot...\cdot n}{(n+1)(n+2)...(2n)}\le \frac 1 {n+1}$
113211
Arithmetics of cardinalities: if $|A|=|C|$ and $|B|=|D|$ then $|A\times B|=|D\times C|$
102420
How to prove that adding $n$ to the numerator and denominator will move the resultant fraction close to $1$?
55095
Why can't we separate fraction powers in euler's formula?
51765
Partial Fraction Decomp. Why repeated factors. And why the (Cx+D) for quadratics?
75503
Rationalizing a Denominator with Cube Roots
54294
Can the product $AB$ be computed using only $+, -,$ and reciprocal operators?
65503
Identity involving LCM and GCD: $\frac{[a,b,c]^2}{[a,b][b,c][c,a]}=\frac{(a,b,c)^2}{(a,b)(b,c)(c,a)}$
113986
Fermat's Last Theorem: implications (there is no new proof)
85422
What is the behavior of integer division?
6410
Prove that $(ma, mb) = |m|(a, b)\ $ [GCD & LCM Distributive Law]
24139
Logical explanation why exponentiation operation is not commutative and associative
26330
Why can we modular reduce arguments of sums and products in modular arithmetic?
104453
A question about the arctangent addition formula.
15030
Is there a law that you can add or multiply to both sides of an equation?