题目内容

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)].
(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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