Question 401533


You may add {{{400+700+900=2000}}}, then add the {{{tens}}} and {{{ones}}} {{{52+21+08=81}}}, and lastly add these two numbers together {{{2000+81=2081}}}.

or, you may add {{{two}}} numbers at a time: {{{452+721=1173}}}, hen add third one to that sum: {{{1173+908= 2081}}}.