1× 1= 1,

1×2=2,

1×3=3,

1×4=4,

1×5=5,

1×6=6,

1×7=7,

1×8=8,

1×9=9,

2×2=4,

2×3=6,

2×4=8,

2×5= 10,

3×3=9,