Răspuns:
Explicație pas cu pas:
r) 5si2/5 = (5*5+2)/5 = 27/5
1si3/10 = (1*10 +3)/10 =13/10 , etc
Nnumitor comun 30:
27/5 -13/10 -7/3 -1/2 =
(6*27 -3*13 -10*7 -15)/30 =
(162 -39 -70 -15)/30 =
38 /30 = 19/15
h) 2/9 - 4/25 = (2*25 -4*9)/9*25 =
(50-36)/9*25 = 14/225
12g) Numitor = 24
(3*17 -2*1 -5 -1*8)/24 =
(51 -2 -5 -8)/24 = 36/24 = 6/4 = 3/2
Cam asa, sunt simple
