555× 12 + 444× 10

= 1 1 1×5× 12 + 1 1 1×4× 10

= 1 1 1×(60+40)

= 1 1 1× 100

= 1 1 100

Solution 2,

555× 12 + 444× 10

= 555× 10 + 444× 10 + 555×2

= 999× 10 + 555×2

= 9990 + 1 1 10

= 1 1 100