问题
解答题
计算题:要求用简便方法计算
(1)73×64+27×65
(2)72×108+108×46-(118×142-118×134)
答案
(1)73×64+27×65,
=73×64+27×(64+1)
=73×64+27×64+27×1
=64×(73+27)+27
=64×100+27
=6400+27
=6427;
(2)72×108+108×46-(118×142-118×134),
=(72+46)×108-(142-134)×118,
=118×108-8×118,
=118×(108-8),
=118×100,
=11800.