Learn a Fact: 3 x 3

1
8
x  1
2
2
x  2
3
3
x  3
4
2
x  3
5
8
x  2
6
5
x  2
7
2
x  8
8
3
x  3
9
4
x  2
10
2
x  5
11
2
x  7
12
2
x  6
13
0
x  4
14
7
x  2
15
2
x  9
16
3
x  2
17
2
x  4
18
9
x  2
19
2
x  2
20
6
x  2

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3

x3


9

3

x3


9

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3
X 2
6
3
X 4
12