ab比cd=ef比gh,则ab=

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ab比cd=ef比gh,则ab=ab比cd=ef比gh,则ab=ab比cd=ef比gh,则ab=解由ab:cd=er:gh知ab/cd=er/gh两边乘以cd即的ab=cd×er/gh.

ab比cd=ef比gh,则ab=
ab比cd=ef比gh,则ab=

ab比cd=ef比gh,则ab=
解由ab:cd=er:gh
知ab/cd=er/gh
两边乘以cd
即的ab=cd×er/gh.