文文周日到游乐宫，上坡用了7分钟，共走了336米；下坡用了9分钟，平均每分钟走64米．文文平均每分钟走多少米？
口算．+=﹣=+=﹣=+=+=﹣= 2﹣= 1﹣﹣=
直接写出得数．﹣=+=+=+= 1﹣=﹣= 3+=﹣= 3﹣1=+=+=+3=
．
直接写出得数．﹣= 0.7﹣0.62= 12÷25== 10=+×0= 13×= 10=
直接写得数．+=+= 1﹣=﹣=﹣=+=﹣1=﹣= 3﹣1=+=
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= 0.7﹣0.62= 12÷25=
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