Răspuns:
Explicație pas cu pas:
[1 /4+ (2,5-13 /4) : 7/8] ×14
= [1/4 + (25/10 - 13/4) *8/7] x 14
= [1/4 + (50/20 - 65/20)*8/7] x 14
= (1/4 - 15/20 *8/7) x 14
= (1/4 - 6/7) x 14
= (7/28 - 24/28) x 14
= -17/28 x 14
= -17/2