问题 解答题
计算:
(1)(-1.2)+[1-(-0.3)];
(2)(-0.5)-(-3
1
4
)+2.75-(+7
1
2
).
答案

(1)(-1.2)+[1-(-0.3)]=-1.2+1+0.3=0.1;

(2)(-0.5)-(-3

1
4
)+2.75-(+7
1
2
)=-0.5+3
1
4
+2.75-7
1
2
=-8+6=-2.

简答题
单项选择题 A1/A2型题