分析:(1)先算除法,再算加法;
(2)根據(jù)乘法分配律進(jìn)行簡(jiǎn)算;
(3)先算除法和乘法,再算加法;
(4)根據(jù)乘法分配律進(jìn)行簡(jiǎn)算;
(5)105=100+5,然后再根據(jù)乘法分配律進(jìn)行簡(jiǎn)算;
(6)先算減法和加法,再算乘法.
解答:解:(1)2.05÷0.82+33.6
=2.5+33.6
=36.1;
(2)5.5×13.3+6.7×5.5
=5.5×(13.3+6.7)
=5.5×20
=110;
(3)7.2÷0.18+20.8×3.6
=40+74.88
=114.88;
(4)28.4×99+28.4
=28.4×(99+1)
=28.4×100
=2840;
(5)1.5×105
=1.5×(100+5)
=1.5×100+1.5×5
=150+7.5
=157.5;
(6)(4.5-2.7)×(1.45+0.8)
=1.8×2.25
=4.05.
點(diǎn)評(píng):考查了運(yùn)算定律與簡(jiǎn)便運(yùn)算,四則混合運(yùn)算.注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算定律簡(jiǎn)便計(jì)算.