问题
解答题
用简便方法计算下面各题.
125×88
36×99
56+56×99.
答案
(1)125×88
=125×8×11
=(125×8)×11
=1000×11
=11000;
(2)36×99
=36×(100-1)
=36×100-36
=3600-36
=3564;
(3)56+56×99
=56×(1+99)
=56×100
=5600.
用简便方法计算下面各题.
125×88
36×99
56+56×99.
(1)125×88
=125×8×11
=(125×8)×11
=1000×11
=11000;
(2)36×99
=36×(100-1)
=36×100-36
=3600-36
=3564;
(3)56+56×99
=56×(1+99)
=56×100
=5600.