Learn a Fact: 3 x 3

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

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3

x3


9

3

x3


9

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3
X 2
6
3
X 4
12