`p/q + r/s = (ps + qr)/(qs)`

`2/p - 3/q = (2q - 3p)/(pq)`

`2/a - 1/2 = (4 - a)/(2a)`

`a/2 + 1/a = (a^2 + 2)/(2a)`

`p/q // r/s = (p/q)/(r/s) = (ps)/(qr)`

`2/a*1/2 = 1/a`

`a/2*1/a = 1/2`

`2/p // 3/q = (2/p)/(3/q) = (2q)/(3p)`

`3/(2a) - 5/b = (3b)/(2ab) - (10a)/(2ab) = (3b - 10a)/(2ab)`

`3/(2a) * 5/b = (15)/(2ab)`

`3/(2a) // 5/b = 3/(2a) * b/5 = (3b)/(10a)`

`1/3 a = 1/3 * a = 1/3 * a/1 = (1*a)/(3*1) = a/3`

`1/3 a + 1/(2a) = a/3 + 1/(2a) = (2a^2)/(6a) + 3/(6a) = (2a^2 + 3)/(6 a)`

`1/3 a * 1/(2a) = a/3 * 1/(2a) = (a)/(6a^2) = (1)/(6a)`

`1/(2a) // 1/3 a = 1/(2a) // a/3 = 1/(2a) * 3/a = 3/(2a^2)`

`(6a) / (8ab) = 3/(4b)`

`(5b) / (15b^3) = 1/(3b^2)`

`(7a)/21 = 1/3 a`

`(5a^2 b) / (ab) = 5a`

`(12 x - xy) / (4 y)`

`(3 x^2) / (4 y)`

`12/y`

`(2pq + 12)/(4p)`

`(3q)/(2p)`

`(pq)/6 = 1/6 pq`

`(123a)/(13b)`

`(11p)/(24q)`

`(241x - 10)/(200y)`

`27/16`

`(24l^3 + 250k^3)/(75k^2l)`

`p = 5/q` . Als `q = 3` dan geldt er: `p = 5/3`

`p = (35q)/3` . Als `q = 3` dan geldt er: `p = 35` .

`p = (14q^2)/15` . Als `q = 3` , dan geldt er: `p = 42/5` .

`5/a + (4a)/(6a^2) = 17/(3a)`

`5/a * (4a)/(6a^2) = 10/(3a^2)`

`5/a // (4a)/(6a^2) = 7,5`

`(5/a)^2 - ((4a)/(6a^2))^2 = 221/(9a^2)`

`500` s.

`8/(1/3)=8 xx 3/1` en `text(m)/(text(m)/text(s))=text(m) xx text(s)/text(m)`

`1:1/4:1/9`

`E` wordt `k^2` maal zo klein.

`P = 7/(2a)`

`K = (21b)/10`

`(8 - 3p^2)/(6p)`

`2/3`