分析:(1)按運(yùn)算順序進(jìn)行計(jì)算,從左向右依次計(jì)算;
(2)按運(yùn)算順序進(jìn)行計(jì)算,先算括號(hào)內(nèi)的,再算括號(hào)外的,在計(jì)算過程中,運(yùn)用拆項(xiàng)與乘法分配律簡(jiǎn)算;
(3)(4)題按運(yùn)算順序進(jìn)行計(jì)算,先算乘法,再算加法;
(5)按運(yùn)算順序進(jìn)行計(jì)算,先算括號(hào)內(nèi)的,再算括號(hào)外的;
(6)題按運(yùn)算順序進(jìn)行計(jì)算,先算乘法,再算減法.
解答:解:(1)162×26-256,
=4212-256,
=3956;
(2)203×(86-16),
=203×70,
=(200+3)×70,
=200×70+3×70,
=14000+210,
=14210;
(3)455+45×5,
=455+225,
=680;
(4)308+360×60,
=308+21600,
=21908;
(5)(270+570)×14,
=840×14,
=11760;
(6)400-13×12,
=400-156,
=(400-100)-56,
=300-56,
=244.
點(diǎn)評(píng):此題重點(diǎn)考查學(xué)生對(duì)整數(shù)四則混合運(yùn)算順序的掌握情況.