问题 解答题
计算:
(1)(-11
1
7
)×
1
5
+(+5
1
7
)×
1
5
+(-137
1
3
)÷5+(+113
1
3
)÷5;
(2)-8-[-7+(1-
2
3
×0.6)÷(-3)].
答案

(1)(-11

1
7
)×
1
5
+(+5
1
7
)×
1
5
+(-137
1
3
)÷5+(+113
1
3
)÷5

=(-11

1
7
)×
1
5
+(+5
1
7
)×
1
5
+(-137
1
3
)×
1
5
+(+113
1
3
)×
1
5

=

1
5
×[(-11
1
7
)+(+5
1
7
)+(-137
1
3
)+(+113
1
3
)]

=

1
5
×[-6+(-24)]

=

1
5
×(-30)

=-6.

(2)-8-[-7+(1-

2
3
×0.6)÷(-3)]

=-8-[-7+(1-

2
3
×
3
5
)×(-
1
3
)]

=-8-[-7+(1-

2
5
)×(-
1
3
)]

=-8-[-7+

3
5
×(-
1
3
)]

=-8-(-7-

1
5

=-8+7

1
5

=-

4
5

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