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Learn a Fact: 1 x 9

1
6
x  1
2
1
x  1
3
8
x  0
4
7
x  0
5
4
x  0
6
1
x  4
7
7
x  1
8
0
x  1
9
1
x  8
10
5
x  1
11
9
x  1
12
0
x  6
13
5
x  0
14
1
x  2
15
3
x  1
16
3
x  0
17
2
x  0
18
9
x  0

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x9


9

9

x1


9

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1
X 8
8
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X 0
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