分析:(1)先算乘法,再算減法;
(2)根據(jù)乘法分配律進(jìn)行簡算;
(3)根據(jù)乘法交換律和結(jié)合律進(jìn)行簡算;
(4)先算乘法和除法,再算減法;
(5)根據(jù)乘法分配律進(jìn)行簡算;
(6)根據(jù)減法的性質(zhì)進(jìn)行簡算.
解答:解:
(1)10-5×1.65,
=10-8.25,
=1.75;
(2)98.4-98.4×0.9,
=98.4×(1-0.9),
=98.4×0.1,
=9.84;
(3)3.2×1.25×0.25,
=(4×0.8)×1.25×0.25,
=(4×0.25)×(0.8×1.25),
=1×1,
=1;
(4)7.75×0.4-0.432÷0.48,
=3.1-0.9,
=2.2;
(5)10.1×8.6,
=(10+0.1)×8.6,
=10×8.6+0.1×8.6,
=86+0.86,
=86.86;
(6)4.35-(2.35-1.7),
=4.35-2.35+1.7,
=2+1.7,
=3.7.
點(diǎn)評(píng):此題主要考查整數(shù)、小數(shù)的四則混合運(yùn)算的運(yùn)算順序和應(yīng)用運(yùn)算定律進(jìn)行簡便計(jì)算