一个背记为“1”，两个背记为“2”，三个背记为“3”，没有背记为“0”，然后把每次的结果分别输入下面的方框内。

One tail as 1, two tails as 2, three tails as 3, no tail as 0, then input the result at a time into the following frames separately.

youdao

一个背记为“1”，两个背记为“2”，三个背记为“3”，没有背记为“0”，然后把每次的结果分别输入下面的方框内。

One tail as 1, two tails as 2, three tails as 3, no tail as 0, then input the result at a time into the following frames separately.

youdao