1) FRACTII ZECIMALE :
321 / 100 = 3 , 21
4/ 1000 = 0, 004
12/ 25 = 12 : 25 = 0, 48
35 /9 = 35 : 9 = 3, ( 8)
15/90 = 15 : 90 = 0, 1(6)
2) FRACTII ORDINARE IREDUCTIBILE:
0, 25 = 25/ 100 = 5 /20 = 1 /4
3,4 = 34/ 10 = 17/ 5
0, (3) = 3/9 = 1 /3
0,1(6) = 16 - 1 / 90 = 15/ 90 = 3 / 18 = 1 /6
0, (21) = 21/ 99 = 7/ 33
3) A) 110 / 176 960/ 225
110 = 2·5·11 960 = 2²·2²·2²·3·5
176 = 2²·2²·11 225 = 3²·5²
B) 110 / 176 = 55 / 88 = 5/8
960 / 225 = 192/ 45 = 64 / 15