a). 1/3 × 6/13 × 39/2 = 1 × 6 × 39 / 3 × 13 × 2 =
= 234/ 78 = 3/1 = 3
( 234/78 simplifici cu 78 )
b). 5/4 × 8/15 × 5/9 = 5 × 8 × 5/ 4 ×15 × 9 =
= 200/540 = 10/27
( 200/540 simplifici cu 20 )
c). 6/7 × 7/5 × 15 = 6 × 7 × 15/ 7 × 5 =
= 630/ 35 = 18/1 = 18
( 630/35 simplifici cu 35 )
d). 77/12 × 4/3 = 77 × 4/ 12 × 3 =
= 308 /36 = 77/9
( 308/36 simplifici cu 4 )
