Răspuns: a) 2/9 ; b) 7/10 ; c) 37789/8400
Explicație pas cu pas:
a) (17/3 : 21/4) : 34/7 =
(17/3 × 4/21) × 7/34 =
68/63 × 7/34 =
2/9
×××××××××××××××
b) (36/13 : 4) : (5/26 : 7/36) =
(36/13 × 1/4) : (5/26 × 36/7) =
9/13 : (5/13 × 18/7) =
9/13 : 90/91 =
9/13 × 91/90 =
7/10
×××××××××××××××
c) (31/2 : 21/3) : (6 : 12,19) =
(31/2 × 3/21) : (6 : 1219/100) =
(31/2 × 1/7) : (6 × 100/1219) =
31/14 : 600/1219 =
31/14 × 1219/600 =
37789/8400
" / " = linie de fractie
Succes ! =)
