Question

Calculeaza rapid,dup modelul prezentat
175 x 999=175 x(1000-1)=
=175 x 1000-175 x 1=
=175000-175=174825

724 x 999
380 x 999
405 x 999

Answer 1

724 x 999 = 723 276

= 724 x ( 1 000 - 1 ) =

= 724 x 1 000 - 724 x 1 =

= 724 000 - 724 = 723 276

_______________________

380 x 999 = 379 620

= 380 x ( 1 000 - 1 ) =

= 380 x 1 000 - 380 x 1 =

= 380 000 - 380 =

= 379 620

_______________________

405 x 999 = 404 595

= 405 x ( 1 000 - 1 ) =

= 405 x 1 000 - 405 x 1 =

= 405 000 - 405 =

= 404 595