问题 填空题
计算下列各题:
(1)1-2+3=______; 
(2)-2×(-7)=______;
(3)(-1)2-|-5|=______;
(4)10÷(-5)=______;
(5)2÷(-
1
6
)
=______;
(6)(-3)2-3÷
1
2
=______;
(7)(-2)3-32=______;
(8)2a-5-3a+1=______.
答案

(1)1-2+3=(1+3)-2=4-2=2;

故答案为:2;

(2)-2×(-7)=14;

故答案为:14;

(3)(-1)2-|-5|=1-5=-4;

故答案为:-4;

(4)10÷(-5)=-2;

故答案为:-2;

(5)2÷(-

1
6
)=2×(-6)=-12;

故答案为:-12;

(6)(-3)2-3÷

1
2
=9-6=3;

故答案为:3;

(7)(-2)3-32=-8-9=-17;

故答案为:-17;

(8)2a-5-3a+1=2a-3a-5+1=-a-4.

故答案为:-a-4.

单项选择题 B1型题
判断题