问题 解答题
计算:
(1)-
1
3
×(-3)+(-
1
5
)×5

(2)(
2
3
-
11
12
-
14
15
)×(-60)

(3)-1
3
4
-(-
1
8
)+3
3
8
+(-2
1
4
)

(4)-42÷(-
1
2
)÷(-1)7+(1
1
8
+1
1
3
-
3
4
)×24
答案

(1)-

1
3
×(-3)+(-
1
5
)×5

=1-1

=0;

(2)(

2
3
-
11
12
-
14
15
)×(-60)

=-

2
3
×60+
11
12
×60+
14
15
×60

=-40+55+56

=71;

(3)-1

3
4
-(-
1
8
)+3
3
8
+(-2
1
4
)

=(-1

3
4
-2
1
4
)+(
1
8
+3
3
8

=-4+3

1
2

=-

1
2

(4)-42÷(-

1
2
)÷(-1)7+(1
1
8
+1
1
3
-
3
4
)×24

=-16×2÷1+(27+32-18)

=-32+41

=9.

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