Learn a Fact: 2 x 4

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

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2

x4


8

4

x2


8

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2
X 3
6
2
X 5
10