解题思路:(1)(2)按照从左到右的顺序计算;
(3)先算除法,再算加法;
(4)先算小括号里面的乘法,再算括号外的除法;
(5)先算除法,再算减法;
(6)先算小括号里面的加法,再算括号外的除法.
(1)201+234-365,
=434-365,
=70;
(2)81×7÷9,
=567÷9,
=63;
(3)399÷7+294,
=57+294,
=351;
(4)672÷(2×3),
=672÷6,
=112;
(5)455-255÷5,
=455-51,
=404;
(6)(369+258)÷3,
=627÷3,
=209.
点评:
本题考点: 整数四则混合运算.
考点点评: 本题考查了简单的四则混合运算,计算时先理清楚运算顺序,根据运算顺序逐步求解即可.