Question

scrieti sub forma de fractie numarul zecimal periodic a)62,(8) b) 0,(72) c) 0,12(12) d) 31,2(621)

Answer 1

a) 62,(8) = (628 - 62)/9 = 566/9
b) 0,(72) = 72/9 = 8
c) 0,12(12) = (1212-12)/9900 = 1200/9900 = 12/99 = 4/33
d) 31,2(621) = (312621-321)/9990 = 312309/9990 = 34701/1110 = 11567/370