考點(diǎn):整數(shù)四則混合運(yùn)算,運(yùn)算定律與簡便運(yùn)算
專題:運(yùn)算順序及法則,運(yùn)算定律及簡算
分析:(1)根據(jù)乘法結(jié)合律進(jìn)行簡算;
(2)根據(jù)乘法結(jié)合律進(jìn)行簡算,最后算加法;
(3)先算減法,再算乘法,最后算除法;
(4)根據(jù)減法的性質(zhì)進(jìn)行簡算;
(5)根據(jù)乘法分配律進(jìn)行簡算;
(6)先算乘法,再按照從左向右的順序進(jìn)行計(jì)算.
解答:
解:(1)32×125
=(4×8)×125
=4×(8×125)
=4×1000
=4000;
(2)384+56×25×4
=384+56×(25×4)
=384+56×100
=384+5600
=5984;
(3)508×345÷(1526-1521)
=508×345÷5
=175260÷5
=35052;
(4)4756-93-607
=4756-(93+607)
=4756-700
=4056;
(5)97×217+3×217
=(97+3)×217
=100×217
=21700;
(6)724+26×24+724
=724+624+724
=1348+724
=2072.
點(diǎn)評:考查了運(yùn)算定律與簡便運(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)算定律簡便計(jì)算.