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Transformati fractiile zecimale periodice in fractii ordinare: a)2,(3) b)1,(12) c)0,(231) d)5,1(3) e)1,2(13).

Răspuns :

Best31cor
a)
23-2 21. 7
------- = ------ = ---
9. 9. 3

b)
112-1. 111. 37
------- = ------ = ------
99. 99. 33

c)
231. 77
----- = ------
999. 333

d)
513-51. 462. 77
---------- = -------- = -----
90. 90. 15

e)
1213-12. 1201
---------- = --------
990. 990

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