Răspuns:
Explicație pas cu pas:
a)
5/2 - 5/4 - (15 - 1)/9 = 10/4 - 5/4 - 14/9 = 5/4 - 14/9 = 45/36 - 56/36 = - 11/36
d)
3/11 + 1/5 - 7/55 = 15/55 + 11/55 - 7/55 = 19/55
g)
400 - 9/25 - 1/4 = 400 - 36/100 - 25/100 = 400 - 61/25 = 400 - 2,44 = 397,56
j)
17/7 + 1/2 - 4/5 = 17/7 + 5/10 - 8/10 = 17/7 - 3/10 = 170/70 - 21/70 = 149/70
