问题 解答题
(1)(-4)×(-8);
(2)36÷(-9);
(3)48
24
25
×(-5)

(4)(+22)×(-33)×(-4)×0;
(5)(-32)÷4×(-8);
(6)75÷(-
2
3
)×(-
3
2
)

(7)(-
3
7
)
×0.125×(-2
1
3
)
×(-8);
(8)-32-(-2)2
(9)2×(-3)2-5÷
1
2
×2

(10)-125÷(-25)-64÷(-4).
答案

(1)(-4)×(-8)

=4×8

=32;

(2)36÷(-9)

=-36÷9

=-4;

(3)48

24
25
×(-5)

=(49-

1
25
)×(-5)

=49×(-5)-

1
25
×(-5)

=-245+

1
5

=-244

4
5

(4)(+22)×(-33)×(-4)×0=0;

(5)(-32)÷4×(-8)

=(-8)×(-8)

=64;

(6)75÷(-

2
3
)×(-
3
2

=75×

3
2
×
3
2

=

675
4

(7)(-

3
7
)×0.125×(-2
1
3
)×(-8)

=(-

3
7
)×
1
8
×(-
7
3
)×(-8)

=-1;

(8)-32-(-2)2

=-9-4

=-13;

(9)2×(-3)2-5÷

1
2
×2

=2×9-5×2×2

=18-20

=-2;

(10)-125÷(-25)-64÷(-4)

=5+16

=21.

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