问题
填空题
计算:
(1)-8+12+7-15=______;
(2)16-12-17+13=______.
答案
(1)原式=-8-15+12+7
=-23+19
=-4,
故答案是:-4;
(2)原式=16+13-12-17
=29-29
=0.
故答案是:0.
计算:
(1)-8+12+7-15=______;
(2)16-12-17+13=______.
(1)原式=-8-15+12+7
=-23+19
=-4,
故答案是:-4;
(2)原式=16+13-12-17
=29-29
=0.
故答案是:0.