问题 解答题
计算:①10
3
5
+(-3
5
6
)+(-8
3
5
)+(-2
1
6
)

     ②(1
4
5
-2
5
6
+3
7
10
-4
8
15
)÷(-
1
30
)
答案

①10

3
5
+(-3
5
6
)+(-8
3
5
)+(-2
1
6
),

=10

3
5
-8
3
5
-3
5
6
-2
1
6

=2-6,

=-4;

②(1

4
5
-2
5
6
+3
7
10
-4
8
15
)÷(-
1
30
),

=(

9
5
-
17
6
+
37
10
-
68
15
)×(-30),

=

9
5
×(-30)-
17
6
×(-30)+
37
10
×(-30)-
68
15
×(-30),

=-54+85-111+136,

=221-165,

=56.

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