问题
解答题
用递等式计算(怎样简便怎样计算).
(125×17)×8
36×47+53×36
59×99+59
480÷[(25-17)×12].
答案
(1)(125×17)×8,
=(125×8)×17,
=1000×17,
=17000;
(2)36×47+53×36,
=36×(47+53),
=36×100,
=3600;
(3)59×99+59,
=59×(99+1),
=59×100,
=5900;
(4)480÷[(25-17)×12],
=480÷[8×12],
=480÷96,
=5.