问题
解答题
用简便方法计算
|
答案
(1)48+89+52,
=48+52+89,
=100+89,
=189;
(2)45×14,
=45×2×7,
=90×7,
=630;
(3)14×12×5,
=14×(12×5),
=14×60,
=840.
用简便方法计算
|
(1)48+89+52,
=48+52+89,
=100+89,
=189;
(2)45×14,
=45×2×7,
=90×7,
=630;
(3)14×12×5,
=14×(12×5),
=14×60,
=840.