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The first day of primary school mathematics
* * * * * * X。

According to the meaning of the question

x× 1/2×2/3×3/5×5/6×6/7×7/8×8/9×9/ 10 = 7。

(Eat one-half a day, one-tenth for nine days, one-half X one day later, one-half X the next day, and so on)

X is 70.

So, the little monkey eats 70-7=63.

Hope to adopt it. Thanks for your hard work, it is convenient for you to read O(∩_∩)O on paper.