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+9 +9 +9 +9 +9 +9 +9 +9 +9
9
-9 -9 -9 -9 -9 -9 -9 -9 -9
90
1 x 9= 10 x 9=
2 x 9= 9 x 9=
3 x 9= 8 x 9=
4 x 9= 7 x 9=
5 x 9= 6 x 9=
6 x 9= 5 x 9=
7 x 9= 4 x 9=
8 x 9= 3 x 9=
9 x 9= 2 x 9=
10 x 9= 1 x 9=
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