69分之2加71分之2的和乘23加25除以71 - 知识问答

69分之2加71分之2的和乘23加25除以71

1个回答

(2/69+2/71)*23+25/71
=2*(69+71)/(69*71) *23+25/71
=2*140/(69*71) *23+25/71
=280/(3*71)+25/71
=(280+25*3)/(3*71)
=355/(3*71)
=5/3

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