2x1
=
____________________
2x2
=
____________________
2x3
=
____________________
2x4
=
____________________
2x5
=
____________________
2x6
=
____________________
2x7
=
____________________
2x8
=
____________________
2x9
=
____________________
2x10
=
____________________
2x11
=
____________________
2x12
=
____________________