考點:小數四則混合運算,運算定律與簡便運算
專題:運算順序及法則
分析:(1)(2)運用乘法分配律簡算.
(3)先算除法,再算減法.
(4)把64看作8×8,運用乘法交換律與結合律簡算.
(5)把99看作100-1,運用乘法分配律簡算.
(6)把32看作4×8,運用乘法結合律簡算.
解答:
解:(1)6.33×101-6.33
=6.33×(101-1)
=6.33×100
=633
(2)4.73×2.5+5.27×2.5
=(4.73+5.27)×2.5
=10×2.5
=25
(3)1.92÷0.12-1.6
=16-1.6
=14.4
(4)12.5×0.25×64
=12.5×0.25×8×8
=(12.5×8)×(0.25×8)
=100×2
=200
(5)0.27×99
=0.27×(100-1)
=0.27×100-0.27
=27-0.27
=26.73
(6)32×0.125
=4×8×0.125
=4×(8×0.125)
=4×1
=4
點評:此題考查了小數的四則混合運算.注意運算順序和運算法則,靈活運用所學的運算定律簡便計算.