Răspuns:
Explicație pas cu pas:
0,(6) = 6/9 = 2/3
2/3 + 4/3 = 6/3 = 2
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0,1(3) = (13 - 1)/90 = 12/90
0,9(3) = (93 - 9)/90 = 84/90
12/90 + 84/90 = 96/90 = 16/15
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0,(75) = 75/99 = 25/33
25/33 + 8/33 = 33/33 = 1
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0,(63) = 63/99 = 21/33
12/33 + 21/33 = 33/33 = 1
