Răspuns :
2/3 din18= 2/3 x 18 =2/1x 6 =12
6/15 x 75=6/1 x 5=30
2/19 x 114 =2/1 x 6=12
5/27 x 486=5/1 x 18 = 90
18/21 x 420 = 18 /7 x 140 =18/1 x 20 = 360
2/3 din18= 2/3 x 18 =2/1x 6 =12
6/15 x 75=6/1 x 5=30
2/19 x 114 =2/1 x 6=12
5/27 x 486=5/1 x 18 = 90
18/21 x 420 = 18 /7 x 140 =18/1 x 20 = 360