Question

Se considera proportia 3/5=12/20.Scrieti proportii derivate:
a) amplificand cu 3
b)simplificand al doilea raport cu 2
c)schimband mezii intre ei
d)schimband extremii intre ei.
Dau coroana!

Answer 1

a) 9/15 = 36/60
b) 3/15 = 6/10
c) 3/12 = 5/20
d) 20/5 = 12/3 

Answer 2

$\frac{3}{5}= \frac{9}{15}$
12/20= 36/60- Amplificare cu 3;
$\frac{12}{20}= \frac{6}{10}$ - Simplificare cu 2;
$\frac{3}{12}= \frac{5}{20}$ - Schimbarea miezilor;
$\frac{20}{5}= \frac{12}{3}$ - Schimbarea extremilor.