题目内容
计算:
(1)(-1
)÷(-1
)
(2)(-5)÷(-10)×(-2)
(3)(-3)÷(
)×(-9)
(4)(-54)×(-2
)÷(-4
)×
.
(1)(-1
2 |
3 |
1 |
3 |
(2)(-5)÷(-10)×(-2)
(3)(-3)÷(
1 |
3 |
(4)(-54)×(-2
1 |
4 |
1 |
2 |
2 |
9 |
分析:原式各项利用除法法则变形,约分即可得到结果.
解答:解:(1)原式=-
×(-
)
=
;
(2)原式=-5×(-
)×(-2)
=-1;
(3)原式=-3×3×(-9)
=81;
(4)原式=-54×(-
)×(-
)×
=-6.
5 |
3 |
3 |
4 |
=
5 |
4 |
(2)原式=-5×(-
1 |
10 |
=-1;
(3)原式=-3×3×(-9)
=81;
(4)原式=-54×(-
9 |
4 |
2 |
9 |
2 |
9 |
=-6.
点评:此题考查了有理数的除法,熟练掌握运算法则是解本题的关键.
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