问题
解答题
599996+49997+3998+407+89=
答案
599996+49997+3998+407+89
=(600000-4)+(50000-3)+(4000-2)+(400+7)+(90-1)
=600000+50000+4000+400+90-(4+3+2-7+1)
=654490-3
=654487.
599996+49997+3998+407+89=
599996+49997+3998+407+89
=(600000-4)+(50000-3)+(4000-2)+(400+7)+(90-1)
=600000+50000+4000+400+90-(4+3+2-7+1)
=654490-3
=654487.