解题思路:(1)先算除法,再算加法;
(2)先算乘法,再从左向右进行计算;
(3)先算小括号里的减法,再算括号外的乘法;
(4)先算乘法,再算减法;
(5)先算小括号里的运算,再算括号外的乘法;
(6)先算除法,再算乘法,最后算加法.
(1)185+315÷5
=185+103
=288;
(2)190-12×5+56
=190-60+56
=130+56
=186;
(3)4×(56-8)
=4×48
=192;
(4)72-12×2
=72-24
=48;
(5)(34+16)×(18-5)
=50×13
=650;
(6)70+30÷6×5
=70+5×5
=70+25
=95.
点评:
本题考点: 整数四则混合运算.
考点点评: 整数混合运算的关键是抓住运算顺序,正确按运算顺序计算即可.