考點(diǎn):小數(shù)四則混合運(yùn)算
專題:運(yùn)算順序及法則
分析:(2)計(jì)算出0.5×0.5后根據(jù)減法的性質(zhì)簡算即可;
(3)(5)根據(jù)乘法分配律簡算即可;
其余的按照小數(shù)四則混合運(yùn)算的計(jì)算方法計(jì)算即可.
解答:
解:(1)(9.15-0.45×3.6)÷0.3
=(9.15-1.62)÷0.3
=7.53÷0.3
=25.1
(2)17.6-0.5×0.5-0.75
=17.6-0.75-0.25
=17.6-(0.75+0.25)
=17.6-1
=16.6
(3)7.86×1.7-0.7×7.86
=7.86×(1.7-0.7)
=7.86
(4)68.1-77.7÷0.7×0.5
=68.1-55.5
=12.6
(5)3.5×5.2+0.35×48
=0.35×(52+48)
=0.35×100
=35
(6)3.08÷[1.6×(3.8-2.05)]
=3.08÷(1.6×1.75)
=3.08÷2.8
=1.1
點(diǎn)評:此題主要考查了學(xué)生根據(jù)小數(shù)四則混合運(yùn)算的方法計(jì)算的能力.