题目内容
(重点)计算:(1)-5+7-2+136-88;(2).
(1)48
(2)
(重点)计算:
(1)(-7)+(-5);(2)(-4)+(+18);(3)(-2.39)+(+5.57)+(-7.61)+(-0.57).
(重点)计算:(1)(+18)-(-2);(2)(-24)-(+30);(3)(-38)-(-7);(4)-3-6-(-15)+(+13).
(重点)计算(1);(2).
(重点)计算:18-6÷(-3)×.