小学一年级奥数题目及答案讲解:数方块3 问题: (1)31+32+33+34+35+15+16+17+18+19= (2)2+13+25+44+18+37+56+75= 答案: (1)31+32+33+34+35+15+16+17+18+19=250 (2)2+13+25+44+18+37+56+75=270