Multiplication 

 

(4x100) + (2x10 )+ 4 =

(8x100) + (4x10) + 7 =

(5x1000) + (4x500) + (3x20) + 6 =

(9x1000) + (3x200) + (1x20) + 7 =

(6x1000) + (4x200) + (3x40) + 1 =

(8x1000) + (3x100) + (3x10) + 3 =