问题 解答题
计算
(1)(-12)-(-
6
5
)+(-8)-
8
10

(2)1-42÷5×(-
1
5
)

(3)(
2
3
-
1
12
-
4
15
)×(-60)
(4)-14÷(-5)2×(-
5
3
)+0.1-1.
答案

(1)原式=-12+

6
5
-8-
4
5

=-20+

2
5

=-19

3
5

(2)原式=1+16÷5×

1
5

=1+

16
25

=

41
25

(3)原式=-

2
3
×60+
1
12
×60+
4
15
×60

=-40+5+16

=-19;

         

(4)原式=-1÷25×(-

5
3
)+0.1-1

=1×

1
25
×
5
3
+0.1-1

=

1
15
+
1
10
-1

=-

5
6

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