问题 解答题
计算:(1)(-125
5
7
)÷(-5);
(2)(-1)10×2+(-2)3÷4.
答案

(1)(-125

5
7
)÷(-5)

=(125+

5
7
)×
1
5

=125×

1
5
+
5
7
×
1
5

=25+

1
7

=25

1
7

(2)(-1)10×2+(-2)3÷4,

=1×2+(-8)÷4,

=2-2,

=0.

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