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Learn a Fact: 2 x 9

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

Fact Navigator

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2

x9


18

9

x2


18

Move on to other facts:
2
X 8
16
3
X 0
0

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