如题所述
139x111/140+11/35x71
=(140-1)x111/140+11/35x(70+1)
=111-111/140+22+11/35
=(111+22)-(111/140-11/35)
=133-67/140
=132又73/140
=(140-1)x111/140+11/35x(70+1)
=111-111/140+22+11/35
=(111+22)-(111/140-11/35)
=133-67/140
=132又73/140
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