Tafels van 1, 2, 5 en 10
Door elkaar
( 2 x 5 = .., 1 x 2 = ..., 3 x 10 = ... )
( 2 x 5 = .., 1 x 2 = ..., 3 x 10 = ... )
Puntjes sommen (door elkaar)
( 2 x ... = 10, ... x 1 = 2, 3 x ... = 30 )
( 2 x ... = 10, ... x 1 = 2, 3 x ... = 30 )