分析:(1)根據(jù)加法結(jié)合律進(jìn)行計(jì)算;
(2)根據(jù)加法交換律進(jìn)行計(jì)算;
(3)根據(jù)減法的性質(zhì)進(jìn)行計(jì)算;
(4)先算括號(hào)里的,再算括號(hào)外面的;
(5)根據(jù)加法交換律和減法的性質(zhì)進(jìn)行計(jì)算;
(6)根據(jù)減法的性質(zhì)進(jìn)行計(jì)算.
解答:解:(1)3.25+2.36+1.64
=3.25+(2.36+1.64)
=3.25+4
=7.25;
(2)2.4+4.85-1.4
=2.4-1.4+4.85
=1+4.85
=5.85;
(3)9.2-2.64-3.14-0.22
=8.2-(2.64+3.14+2.22)
=8.2-8
=0.2;
(4)13.56-(4.4+3.44)
=13.56-7.84
=5.72;
(5)2.98-3.24+1.12-0.76
=(2.98+1.12)-(3.24+0.76)
=4.1-4
=0.1;
(6)3.28-(1.2-3.6)
=3.28-1.2+3.6
=2.08+3.6
=5.68.
點(diǎn)評(píng):本題重點(diǎn)考查了學(xué)生在小數(shù)四則運(yùn)算中靈活運(yùn)用簡(jiǎn)便計(jì)算方法來(lái)進(jìn)行計(jì)算的能力.