计算(1)(212)×(-15)×(-313);(2)(-513)×(+178)×(-215);(3)(-0.1)×(-0.001)×(-100)×(-1000

计算(1)(212)×(-15)×(-313);(2)(-513)×(+178)×(-215);(3)(-0.1)×(-0.001)×(-100)×(-1000

题型:解答题难度:一般来源:不详
计算(1)(2
1
2
)×(-
1
5
)×(-3
1
3
);
(2)(-5
1
3
)×(+1
7
8
)×(-2
1
5
);
(3)(-0.1)×(-0.001)×(-100)×(-1000);
(4)(6
1
3
-8
1
4
)×1
1
2

(5)2÷(-
3
7
)×
4
7
÷(-5
1
7
);
(6)-1+5÷(-
1
6
)×(-6).
答案
(1)(2
1
2
)×(-
1
5
)×(-3
1
3
)=
5
2
×
1
5
×
10
3
=
5
3

(2)(-5
1
3
)×(+1
7
8
)×(-2
1
5
)=
16
3
×
15
8
×
11
5
=22;
(3)(-0.1)×(-0.001)×(-100)×(-1000)=0.1×100×0.001×1000=10;
(4)(6
1
3
-8
1
4
)×1
1
2
=
19
3
×
3
2
-
33
4
×
3
2
=
19
2
-
99
8
=-
23
8

(5)2÷(-
3
7
)×
4
7
÷(-5
1
7
)=2×
7
3
×
4
7
×
7
36
=
14
27

(6)-1+5÷(-
1
6
)×(-6)-1+5×6×6=-1+180=-179.
举一反三
计算:(-1)n+(-1)n-1(n是大于1的整数)的结果为(  )
A.-1B.-2C.2D.0
题型:单选题难度:简单| 查看答案
计算:
(1)(+
1
5
)+(-2
1
3
)-(-2
4
5
)-(+3
2
3
)

(2)29
5
6
×(-12)

(3)-22×[(-5)2×
4
25
-|-2|3]
题型:解答题难度:一般| 查看答案
计算:
(1)-20+(-14)-(-18)-13;
(2)3×23÷(-3);
(3)(
1
2
-
5
9
+
7
12
)×(-36);
(4)2×(-3)2+5÷
1
2
×(-2)
题型:解答题难度:一般| 查看答案
计算:
(1)-(
6
7
-1
1
5
)÷1
5
7

(2)|-5|+6×(
1
3
-
1
2
)-(-1)2
题型:解答题难度:一般| 查看答案
计算(-10)2+[(-2)2-(3+32)×2].
题型:解答题难度:一般| 查看答案
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