分析:(1)運(yùn)用加法交換律和結(jié)合律簡(jiǎn)算;
(2)運(yùn)用減法的性質(zhì)簡(jiǎn)算;
(3)把99看作100-1,運(yùn)用乘法分配律的逆運(yùn)算簡(jiǎn)算;
(4)運(yùn)用乘法分配律的逆運(yùn)算簡(jiǎn)算;
(5)先算括號(hào)內(nèi)的除法,原式變?yōu)椋?10-2)×4,把210看作 200+10,運(yùn)用乘法分配律計(jì)算;
(6)把16拆成4×4后,再據(jù)乘法結(jié)合律簡(jiǎn)算.
解答:解:(1)3.27+6.4+2.73+4.6,
=(3.27+2.73)+(6.4+4.6),
=6+11,
=17;
(2)60-18.27-1.73,
=60-(18.27+1.73),
=60-20,
=40;
(3)99×47,
=(100-1)×47,
=100×47-47,
=4700-47,
=4653;
(4)102×12+98×12,
=(102+98)×12,
=200×12,
=2400;
(5)(210-62÷31)×4,
=(210-2)×4,
=(200+10-2)×4,
=200×4+8×4,
=800+32,
=832;
(6)25×16,
=25×4×4,
=100×4,
=400.
點(diǎn)評(píng):完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的簡(jiǎn)便方法計(jì)算.