计算下列各式:(1)(-13)+(-8)(2)-27-(-17)(3)(-56)×(-310)(4)-1+(-2)-(-3)-5(5)-24×(-12+34-1

计算下列各式:(1)(-13)+(-8)(2)-27-(-17)(3)(-56)×(-310)(4)-1+(-2)-(-3)-5(5)-24×(-12+34-1

题型:解答题难度:一般来源:不详
计算下列各式:
(1)(-13)+(-8)
(2)-27-(-17)
(3)(-
5
6
)×(-
3
10
)

(4)-1+(-2)-(-3)-5
(5)-24×(-
1
2
+
3
4
-
1
3
)

(6)|-2
1
2
|-(-2.5)+1-|1-2
1
2
|

(7)(-3)×
5
6
×(-
4
5
)×(-
1
4
)

(8)
1
6
+
1
20
+
1
12
+
1
30
(巧算)
(9)-7×(-
22
7
)+26×(-
22
7
)-2×
22
7
答案
(1)(-13)+(-8)=-21;

(2)-27-(-17)=-10;

(3)(-
5
6
)×(-
3
10
)
=
1
4


(4)-1+(-2)-(-3)-5
=-1-2+3-5
=-8+3
=-5;

(5)-24×(-
1
2
+
3
4
-
1
3
)

=24×
1
2
-24×
3
4
+24×
1
3

=12-18+8
=2;

(6)|-2
1
2
|-(-2.5)+1-|1-2
1
2
|

=2.5+2.5+1-1.5
=6-1.5
=4.5;

(7)(-3)×
5
6
×(-
4
5
)×(-
1
4
)

=-3×
5
6
×
4
5
×
1
4

=-
1
2


(8)
1
6
+
1
20
+
1
12
+
1
30

=
10
60
+
3
60
+
5
60
+
2
60

=
1
3


(9)-7×(-
22
7
)+26×(-
22
7
)-2×
22
7

=(7-26-2)×
22
7

=-21×
22
7

=-66.
举一反三
计算
(1)-6-(-9)+(-3)+(-4)
(2)(-
1
6
+
3
4
-
1
12
)×(-48)
×24
(3)-13-(1+0.5)×
1
3
÷(-4)

(4)-2x2y+xy+13xy-(-5x2y)
题型:解答题难度:一般| 查看答案
计算:
(1)4.7-(-8.9)-7.5+(-6)
(2)49
24
25
×(-5)
(3)(
7
9
-2
1
6
-1
3
4
)÷(-
1
6
2
(4)(-5)×3
1
3
+2×3
1
3
-6×3
1
3

(5)(-1)2011-(-22)×(-1)5-36×(-
1
3
)2
题型:解答题难度:一般| 查看答案
电脑上设计了一个有理数运算程序:a*b=a2-b2-2b÷(a-b),求:(-2)*
1
2
的值.
题型:解答题难度:一般| 查看答案
计算:
(1)(-3)2-
3
5
×[3×(-
2
3
2-14]+8×[(
1
2
2-(-
1
2
3-1];
(2)[(1-
1
3
2-(-1
2
3
)÷(-1
1
8
)]×(-1
1
2
3
题型:解答题难度:一般| 查看答案
计算:
(1)-9÷3+(
1
2
-
2
3
)×12+(-3)2

(2)-22+(-2)4×(
1
2
3-|0.28|÷(-
1
10
2
题型:解答题难度:一般| 查看答案
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