问题
解答题
用简便方法计算
|
答案
(1)125×32,
=125×8×4,
=1000×4,
=4000;
(2)640÷5÷8,
=640÷(5×8),
=640÷40,
=16;
(3)653-98,
=653-100+2,
=453+2,
=455;
(4)944+102,
=944+100+2,
=1044+2,
=1046.
用简便方法计算
|
(1)125×32,
=125×8×4,
=1000×4,
=4000;
(2)640÷5÷8,
=640÷(5×8),
=640÷40,
=16;
(3)653-98,
=653-100+2,
=453+2,
=455;
(4)944+102,
=944+100+2,
=1044+2,
=1046.