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Learn a Fact: 2 x 9

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

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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