zamień ulamki okresowe na zwykłe: O,(81), 5,3(18)
O,(81)
100x=81,(81)
10000x=8181,(81)
9900x=8100
x=8100/9900
x=81/99
5,3(18)
10x=53,(18)
1000x=5318,(18)
990x=5265
x=5265/990
x=1053/198=5 63/198=5 7/22
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O,(81)
100x=81,(81)
10000x=8181,(81)
9900x=8100
x=8100/9900
x=81/99
5,3(18)
10x=53,(18)
1000x=5318,(18)
990x=5265
x=5265/990
x=1053/198=5 63/198=5 7/22