计算下列各式:(1)(-13)+(-8)(2)-27-(-17)(3)(-56)×(-310)(4)-1+(-2)-(-3)-5(5)-24×(-12+34-13)(6)|-212|-(-2.5)+1

题目简介

计算下列各式:(1)(-13)+(-8)(2)-27-(-17)(3)(-56)×(-310)(4)-1+(-2)-(-3)-5(5)-24×(-12+34-13)(6)|-212|-(-2.5)+1

题目详情

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
题型:解答题难度:中档来源:不详

答案

(1)(-13)+(-8)=-21;

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

(3)(-class="stub"5
6
)×(-class="stub"3
10
)
=class="stub"1
4


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

(5)-24×(-class="stub"1
2
+class="stub"3
4
-class="stub"1
3
)

=24×class="stub"1
2
-24×class="stub"3
4
+24×class="stub"1
3

=12-18+8
=2;

(6)|-2class="stub"1
2
|-(-2.5)+1-|1-2class="stub"1
2
|

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

(7)(-3)×class="stub"5
6
×(-class="stub"4
5
)×(-class="stub"1
4
)

=-3×class="stub"5
6
×class="stub"4
5
×class="stub"1
4

=-class="stub"1
2


(8)class="stub"1
6
+class="stub"1
20
+class="stub"1
12
+class="stub"1
30

=class="stub"10
60
+class="stub"3
60
+class="stub"5
60
+class="stub"2
60

=class="stub"1
3


(9)-7×(-class="stub"22
7
)+26×(-class="stub"22
7
)-2×class="stub"22
7

=(7-26-2)×class="stub"22
7

=-21×class="stub"22
7

=-66.

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