问题
解答题
脱式计算:
|
答案
(1)360+(250-118),
=360+132,
=492;
(2)38+(82+198),
=38+280,
=318;
(3)134+298,
=134+(300-2),
=134+300-2,
=434-2,
=432;
(4)326-197,
=326-(200-3),
=326-200+3,
=126+3,
=129.
脱式计算:
|
(1)360+(250-118),
=360+132,
=492;
(2)38+(82+198),
=38+280,
=318;
(3)134+298,
=134+(300-2),
=134+300-2,
=434-2,
=432;
(4)326-197,
=326-(200-3),
=326-200+3,
=126+3,
=129.