(-5)×(-8 7 9 )-(-7)(+ 79 7 )+12÷(- 9 79 )

(-5)×(-8 7 9 )-(-7)(+ 79 7 )+12÷(- 9 79 ) .
2025-06-26 12:02:58
推荐回答(1个)
回答1:

(-5)×(-8
7
9
)-(-7)×(+
79
7
)+12÷(-
9
79
)

=
79
9
+7×
79
7
-12×
79
9

=
79
9
×(5-12)+79
=79×(1-
7
9

=79×
2
9

=17
5
9