问题 解答题
计算:
(1)18-6÷(-2)×(-
1
3
)

(2)
2
3
-
1
8
-(-
1
3
)+(-
3
8
)

(3)(
1
2
-
5
9
+
5
6
-
7
12
)
×(-36)
(4)-14÷(-5)2×(-
5
3
)+|0.8-1|
答案

(1)18-6÷(-2)×(-

1
3
)

=18-3×

1
3

=18-1

=17;

(2)

2
3
-
1
8
-(-
1
3
)+(-
3
8
)

=(

2
3
+
1
3
)-(
1
8
+
3
8

=1-

1
2

=

1
2

(3)(

1
2
-
5
9
+
5
6
-
7
12
)×(-36)

=

1
2
×(-36)-
5
9
×(-36)+
5
6
×(-36)-
7
12
×(-36)

=-18+20-30+21

=-7;

(4)-14÷(-5)2×(-

5
3
)+|0.8-1|

=-1÷25×(-

5
3
)+
1
5

=

1
15
+
1
5

=

4
15

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