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(1)-12+11-8(2)(-9)÷(-3)+(-20)÷2(3)-13×(-3)+(-15)×5(4)(23-1112-1415)×(-60)(5)-134-(-18)+338+(-214)(6)-1100-(1-0.5)×13×[3-(-3)2].

题目详情
(1)-12+11-8
(2)(-9)÷(-3)+(-20)÷2
(3)-
1
3
×(-3)+(-
1
5
)×5
(4)(
2
3
-
11
12
-
14
15
)×(-60)
(5)-1
3
4
-(-
1
8
)+3
3
8
+(-2
1
4
)
(6)-1100-(1-0.5)×
1
3
×[3-(-3)2].
▼优质解答
答案和解析
(1)-12+11-8
=-1-8
=-9;

(2)(-9)÷(-3)+(-20)÷2
=3+(-10)
=-7;

(3)-
1
3
×(-3)+(-
1
5
)×5
=1-1
=0;

(4)(
2
3
-
11
12
-
14
15
)×(-60)
=-40+55+56
=71;

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

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

=-4+3
1
2

=-
1
2


(6)-1100-(1-0.5)×
1
3
×[3-(-3)2]
=-1-
1
2
×
1
3
×[3-9]
=-1-
1
2
×
1
3
×[-6]
=-1+1
=0.