【解析】
试题分析:(1)可根据加法交换律计算;
(2)可根据一个数减两个数,等于减去这两个数的和的减法性质计算;
(3)可根据凑整法计算;
(4)(5)(6)根据四则混合运算的运算顺序计算即可:先算乘除,再算加减,有括号的要先算括号里面的.
解:(1)389+327+211
=389+211+327,
=600+327,
=927;
=608\ufe63(154+146),
=608\ufe63300,
=308;
=587\ufe63(100\ufe632),
=587\ufe63100+2,
=487+2,
=489;
=258+2592,
=2850;
=286+121,
=407.
题型:解答题 题类: 难度:一般 组卷次数:0