发布网友 发布时间:2024-10-16 11:09
共1个回答
热心网友 时间:2024-10-16 12:42
(1)(-14)4005×162003
=(-14)4005×(42)2003
=(-14)4005×44006
=(-14)4005×44005×4
=[(-14)×4]4005×4
=(-1)×4
=-4;
(2)318×(-19)8
=318×[-(13)2]8
=318×(13)16
=316+2×(13)16
=(3×13)16×32
=9;
(3)(0.5×323)199?(-2×311)200
=(0.5×113)199?(-2×311)200
=[0.5×113×(-2)×311]199×(-2×311)
=611;
(4)0.259×220×259×3
=0.259×3×220×259
=0.259×(43)3×410×259
=(0.25×4)9×(4×25)9×4
=4×1018.