(0.0777……+0.0232323……)×0.22222……×99/100
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(0.0777……+0.0232323……)×0.22222……×99/100(0.0777……+0.0232323……)×0.22222……×99/100(0.0777……+0.0232323……)
(0.0777……+0.0232323……)×0.22222……×99/100
(0.0777……+0.0232323……)×0.22222……×99/100
(0.0777……+0.0232323……)×0.22222……×99/100
(0.0777……+0.0232323……)×0.22222……×99/100
=(7/90+23/990)×2/9×99/100
=10/99×11/50
=1/45
今天感觉头晕