问题
填空题
(1)125×47×8=125×______×47
(2)125×64-25×64=(______-______)×64
(3)561-128-72=561-(______+______)
答案
(1)125×47×8,
=125×8×47,
=1000×47,
=47000;
(2)125×64-25×64,
=( 125-25)×64,
=100×64,
6400;
(3)561-128-72,
=561-(128+72),
=561-200,
=461;
故答案为:(1)8;(2)125、25;(3)128、72;