考點:整數(shù)四則混合運算,運算定律與簡便運算,小數(shù)四則混合運算
專題:運算順序及法則,運算定律及簡算
分析:(1)把3.2拆分為4×0.8,然后根據(jù)乘法的結(jié)合律簡算;
(2)(4)根據(jù)乘法的分配律簡算;
(3)根據(jù)加法的交換律與結(jié)合律簡算;
(5)根據(jù)除法的性質(zhì)簡算;
(6)根據(jù)減法的性質(zhì)簡算.
解答:
解:(1)25×3.2×125
=(25×0.4)×(8×125)
=10×1000
=10000
(2)6.9×101-69×0.1
=6.9×101-6.9×1
=6.9×(101-1)
=6.9×100
=690
(3)36.3+26.44+13.7+3.56
=(36.3+13.7)+(26.44+3.56)
=50+30
=80
(4)264×96+8×132
=264×96+(4×2)×132
=264×96+4×264
=264×(96+4)
=264×100
=26400
(5)3000÷125÷8
=3000÷(125×8)
=3000÷1000
=3
(6)36.36-(6.36+7.2)
=36.36-6.36-7.2
=30-7.2
=22.8
點評:此題主要考查整數(shù)、小數(shù)的四則混合運算的運算順序和應(yīng)用運算定律進行簡便計算.