题目内容

计算:
(1)-6-(-9)+|-3|+(-4)
(2)(-
1
6
+
3
4
-
1
12
)×(-48)
(3)25×
3
4
-(-25)×
1
2
+25×(-
1
4
)

(4)-14-(1-0.5)×
1
3
×[10-(-2)2]
-(-1)3
(1)原式=-6+9+3-4
=3+3-4
=2;

(2)原式=(-
1
6
)×(-48)+
3
4
×(-48)-
1
12
×(-48)
=8-36+4
=-24;

(3)原式=25×(
3
4
+
1
2
-
1
4

=25×1
=25;

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