问题
解答题
下面各题怎样简便就怎样算.
|
答案
(1)456+322+178,
=456+(322+178),
=456+500,
=956;
(2)(780-724)×15,
=56×15,
=840;
(3)973-245-255,
=973-(245+255),
=973-500,
=473;
(4)1800-1800÷15,
=1800-120,
=1680.
下面各题怎样简便就怎样算.
|
(1)456+322+178,
=456+(322+178),
=456+500,
=956;
(2)(780-724)×15,
=56×15,
=840;
(3)973-245-255,
=973-(245+255),
=973-500,
=473;
(4)1800-1800÷15,
=1800-120,
=1680.