解题思路:(1)利用加法交换律与结合律简算;
(2)(3)先算除法,再算减法,最后算乘法;
(4)利用乘法分配律简算;
(5)乘法利用结合律简算,最后算加法;
(6)利用交换律先算减法,再算乘法;
(7)把99=100-1,利用乘法分配律简算;
(8)把64=8×8简算.
(1)89+124+11+26+48
=(89+11)+(124+26+48)
=100+198
=298;
(2)(64-224÷14)×12
=(64-16)×12
=48×12
=576;
(3)120×(38+405÷27)
=120×(38+15)
=120×53
=6360;
(4)163×25+237×25
=(163+237)×25
=400×25
=10000;
(5)384+98×25×4
=384+98×(25×4)
=384+98×100
=384+9800
=10184;
(6)724+26×24-724
=724-724+26×24
=26×24
=26×4×6
=104×6
=624;
(7)365×99
=365×(100-1)
=365×100-365×1
=36500-365
=36135;
(8)125×64
=125×8×8
=1000×8
=8000.
点评:
本题考点: 整数四则混合运算;运算定律与简便运算.
考点点评: 整数混合运算的关键是抓住运算顺序,正确利用运算定律简算.