问题
解答题
脱式计算.
|
答案
(1)285-(61+59),
=285-120,
=165;
(2)75×16-180,
=1200-180,
=1020;
(3)17×(253-186),
=17×67,
=1139.
脱式计算.
|
(1)285-(61+59),
=285-120,
=165;
(2)75×16-180,
=1200-180,
=1020;
(3)17×(253-186),
=17×67,
=1139.