问题
解答题
199+298+397+496+595+20=______.
答案
199+298+397+496+595+20
=(199+1)+(298+2)+(397+3)+(496+4)+(595+5)+5
=200+300+400+500+600+5
=2005.
故答案为:2005.
199+298+397+496+595+20=______.
199+298+397+496+595+20
=(199+1)+(298+2)+(397+3)+(496+4)+(595+5)+5
=200+300+400+500+600+5
=2005.
故答案为:2005.