Which of the following represent positive numbers?

I. -3 - (-5)

II. (-3)(-5)

III. -5 - (-3)


I only

II only

III only

I and II

II and III

考题讲解

题目分析:

直接计算各个选项的值,特别要注意正负号。

 I.–3 – (–5)=-3+5=2;

II. (–3)(–5)=15;

III. –5 – (–3)=-5+3=-2.

所以,i 和 ii 是正数。综上:答案是 D

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