问题 解答题
[简算]
473+245-173
327-175-125698-(387+298)
答案

(1)473+245-173

=473-173+245

=300+245

=545;

(2)327-175-125

=327-(175+125)

=327-300

=27;

(3)698-(387+298)

=698-298-387

=400-387

=13.

选择题
填空题