分析:①6.4+3.25+3.6利用加法的交換律和結(jié)合律變成(6.4+3.6)+3.25;
②7.26-2.57-3.43利用一個數(shù)連續(xù)減去兩個數(shù)等于這個數(shù)減去這兩個數(shù)的和,7.26-(2.57+3.43)計(jì)算簡便;
③101×23,把101拆成100+1,利用乘法分配律變成(100+1)×23計(jì)算簡便;
④23×134-34×23利用乘法分配律;
⑤99×62+62利用乘法分配律變成62×(99+1).
解答:解:①6.4+3.25+3.6,
=(6.4+3.6)+3.25,
=10+3.25,
=13.25;
②7.26-2.57-3.43,
=7.26-(2.57+3.43),
=7.26-6,
=1.26;
③101×23,
=(100+1)×23,
=100×23+23,
=2323;
④23×134-34×23,
=23×(134-34),
=23×100,
=2300;
⑤99×62+62,
=62×(99+1),
=62×100,
=6200.
點(diǎn)評:完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的簡便方法計(jì)算.