This seems to work (on x86, at least): 
printf("%.5f\n", sprintf("%.6f1", $_))
    for (0.000005, 0.000015, 0.000025, 0.000035, 0.000045, 0.000055, 0
+.000065)

[download]

In reply to Re: RFC: Large Floating Point Numbers - Rounding Errors by salva
in thread RFC: Large Floating Point Numbers - Rounding Errors by GAVollink

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