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
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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天呐,我真的好多基础计算都做错
天呐,我真的好多基础计算都做错