问题 解答题
计算:
(1)(-0.5)-(-3
1
4
)+2.75-(+7
1
2
)

(2)-19
17
18
×(-36)

(3){1-[
1
16
-(-0.25)3(-2)4}÷[7×(-
1
8
)+5÷(-8)+4×(-0.125)]
答案

(1)原式=-

1
2
+
13
4
+
11
4
-
15
2
=-
2
4
+
13
4
+
11
4
-
30
4
=-2;

(2)原式=-

18×19+17
18
×(-36)=718;

(3)原式={1-[

1
16
-(-
1
64
)×16]}÷[-
7
8
-
5
8
-
1
2
]

=[1-(

1
16
+
1
4
)]÷[-
7
8
-
5
8
-
4
8
]

=[1-

5
16
]÷(-2)

=

11
16
×(-
1
2

=-

11
32

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