解题思路:(1)按照从左到右的顺序计算;
(2)先算小括号里面的减法,再算括号外的乘法;
(3)先算除法,再算减法;
(4)先算小括号里面的加法,再算括号外的除法;
(5)按照从左到右的顺序计算;
(6)先算乘法,再算减法.
(1)240÷2×5,
=120×5,
=600;
(2)(111-75)×13,
=36×13,
=468;
(3)400-128÷4,
=400-32,
=368;
(4)(45+54)÷3,
=99÷3,
=33;
(5)25×4×15,
=100×15,
=1500;
(6)1600-85×12,
=1600-1020,
=580.
点评:
本题考点: 整数四则混合运算.
考点点评: 本题考查了整数的四则混合运算,关键是理清楚运算的顺序,根据运算顺序逐步求解即可.