Calculate 761multiply by 999 add 761 using property

We are given

761 $\times$ 999 + 761

We can write 999 = 1000 - 1, so

= 761 $\times$ (1000 - 1) + 761

= 761000 - 761 + 761, equal terms with opposite sign will get cancelled

= 761000 (answer)