问题
解答题
计算下面各题,怎样简便就怎样计算.
|
答案
(1)98+376+2,
=(98+2)+376,
=100+376,
=476;
(2)569-75=494;
(3)25×97×4,
=(25×4)×97,
=100×97,
=9700;
(4)137×38+63×38,
=(137+63)×38,
=200×38,
=7600;
(5)300÷25÷4,
=300÷(25×4),
=300÷100,
=3;
(6)158+320÷(20-12),
=158+320÷8,
=158+40,
=198.