问题
解答题
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答案
(1)125×23×16,
=(125×8)×(23×2),
=1000×46,
=46000;
(2)54×43+54×58-54,
=54×(43+58-1),
=54×100,
=5400;
(3)4.26×52.7﹢35.2×5.27﹢0.222×527,
=4.26×52.7﹢3.52×52.7﹢2.22×52.7,
=(4.26+3.52+2.22)×52.7,
=10×52.7,
=527;
(4)2003-2002+2001-2000+…+5-4+3-2+1,
=(2003-2002)+(2001-2000)+…+(5-4)+(3-2)+1,
=1×1001+1
=1002;
(5)1998×19991999-1999×19981998,
=1998×1999×10001-1999×1998×10001,
=0.