分析:(1)化3.2=4×0.8,再運(yùn)用乘法交換律和結(jié)合律解答,
(2)(3)(4)運(yùn)用乘法分配律解答,
(5)(6)依據(jù)四則運(yùn)算計算方法,先算第二級運(yùn)算,再算第一級運(yùn)算,如果只含有同一級運(yùn)算,按照從左到右順序計算,有括號先算括號里面的解答.
解答:解:(1)1.25×3.2×2.5,
=(1.25×0.8)×(4×2.5),
=1×10,
=10;
(2)1.8×5.6+44×0.18,
=1.8×(5.6+4.4),
=1.8×10,
=18;
(3)3.4×99+3.4,
=3.4×(99+1),
=3.4×100,
=340;
(4)101×8.3-8.3,
=(101-1)×8.3,
=100×8.3,
=830;
(5)(27÷1.8-11)×2.5,
=(15-11)×2.5,
=4×2.5,
=10;
(6)39.4×[0.96÷(5.4÷0.9)],
=39.4×[0.96÷6],
=39.4×0.16,
=6.304.
點(diǎn)評:本題主要考查學(xué)生依據(jù)四則運(yùn)算計算方法,以及正確選擇丙運(yùn)用四則運(yùn)算簡便算法解決問題的能力.