A cement plant plans to produce a batch of cement in January. In fact, it has completed one third of the plan in the first ten days, 40% in the middle of the year, and produced again in the last ten days How many million tons are planned to be produced in January? Don't solve the equation!
2.6÷﹙1-1/3-40%+1/6﹚
=2.6÷﹙2/3-2/5+1/6)
=2.6÷(20/30-12/30+5/30)
=2.6÷13/30
=2.6×30/13
=60000 tons
A: it was planned to produce 60000 tons in the original month
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