解:(1)296+25+75
=296+(25+75),
=296+100,
=396;
(2)1479-399
=1479-400+1,
=1079+1,
=1080;
(3)756-74-26
=756-(74+26),
=756-100,
=656;
(4)360÷12÷5
=360÷(12×5),
=360÷60,
=6;
(5)2800÷35
=2800÷(7×5),
=2800÷7÷5,
=400÷5,
=80.
(6)25×32
=25×4×8,
=100×8,
=800.
分析:(1)可根據(jù)加法結(jié)合律計(jì)算;
(2)可根據(jù)湊整法將原式變?yōu)?479-400-1進(jìn)行計(jì)算;
(3)可根據(jù)一個(gè)數(shù)減兩個(gè)數(shù),等于用這個(gè)數(shù)減去這兩個(gè)數(shù)的和的減法性質(zhì)計(jì)算;
(4)可根據(jù)一個(gè)數(shù)除以兩個(gè)數(shù),等于用這個(gè)數(shù)除以這兩個(gè)數(shù)的積的除法性質(zhì)計(jì)算;
(5)可將35拆分為7×5后,根據(jù)一個(gè)數(shù)除以兩個(gè) 數(shù)的積,等于用這個(gè)數(shù)分別除以這兩個(gè)數(shù)的除法性質(zhì)計(jì)算;
(6)可將32拆分為4×8計(jì)算.
點(diǎn)評(píng):完成此類題目要注意分析式中數(shù)據(jù)的特點(diǎn)及內(nèi)在聯(lián)系,然后運(yùn)用合適的方法計(jì)算.