(71+1/6)×6/7+(61+1/5)×5/6+(51+1/4)×4/5
=(70+7/6)×6/7+(60+6/5)×5/6+(50+5/4)×4/5
=61+51+41
=153
如果你觉得我的回答比较满意,因为解答被采纳是我们孜孜不倦为之付出的动力!
(71+1/6)×6/7+(61+1/5)×5/6+(51+1/4)×4/5
=(70+7/6)×6/7+(60+6/5)×5/6+(50+5/4)×4/5
=61+51+41
=153
如果你觉得我的回答比较满意,因为解答被采纳是我们孜孜不倦为之付出的动力!