39(148/149)+148(74/149)=?

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39*(148/149)+148*(74/149)=?39*(148/149)+148*(74/149)=?39*(148/149)+148*(74/149)=?原式=39*(148/149)+74*

39*(148/149)+148*(74/149)=?
39*(148/149)+148*(74/149)=?

39*(148/149)+148*(74/149)=?
原式=39*(148/149)+74*(148/149)=113*(148/149)=113-113/149=16724/149
即112又36/149