Przedstaw w postaci ułamka zwykłego:
a.4,12(5)
b.31,2(16)
a) 4,12(5) = 4,125555...
100x = 412,5555....
1000x = 4125,5555....
1000x - 100x = 4125,5555... - 412,5555....
900x = 3713 |:900
b) 31,2(16) = 31,2161616...
10x = 312,161616...
1000x = 31216,161616...
1000x - 10x = 31216,161616... - 312,161616...
990x = 30904 |:990
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a) 4,12(5) = 4,125555...
100x = 412,5555....
1000x = 4125,5555....
1000x - 100x = 4125,5555... - 412,5555....
900x = 3713 |:900
b) 31,2(16) = 31,2161616...
10x = 312,161616...
1000x = 31216,161616...
1000x - 10x = 31216,161616... - 312,161616...
990x = 30904 |:990