Learn a Fact: 2 x 9

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

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2

x9


18

9

x2


18

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2
X 8
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