题目内容

(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).
(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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