问题 解答题
计算或化简
(1)
1
4
-
0.52
-
38

(2)-
(-81)2
-2
3-83

(3)
2
+3
2
-5
2

(4)
6
1
6
-
6
答案

(1)

1
4
-
0.52
-
38

=

1
2
-
1
2
-2,

=-2;

(2)-

(-81)2
-2
3-83

=-81-2×(-8),

=-81+16,

=-65;

(3)

2
+3
2
-5
2

=(1+3-5)

2

=-

2

(4)

6
1
6
-
6
),

=1-6,

=-5.

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