试题:
计算:
(1)-3-(-6)+(-4)
(2)(-
1
3
)+(+
2
5
)-(-
3
5
)+(-1
2
3
)

(3)3×(-4)+(-28)÷7
(4)(
1
2
-
5
9
+
7
12
)×(-36)

(5)23-6÷3×
1
3

(6)-12-(1+0.5)×
1
3
÷(-4)

答案:

我来补答
(1)原式=-3+6-4=-7+6=-1;
(2)原式=(-
1
3
-1
2
3
)+(
2
5
+
3
5
)=-2+1=-1;
(3)原式=-12-4=-16;
(4)原式=-18+20-21=-19;
(5)原式=8-2×
1
3
=8-
2
3
=7
1
3

(6)原式=-1-
3
2
×
1
3
×(-
1
4
)=-1+
1
8
=-
7
8
 
 
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