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计算(1)(-3.6)+(+2.5)(2)3-2×(-5)2(3)−24×(−56+38−112)(4)12+(−23)+45+(−12)+(−13)(5)−14−(1314−1112)×[4−(−2)2](6)5×(-6)-(-4)2÷(-8)(7)-7.2-0.9-5.6+1.7(8)(−135)+(−3.2)

题目详情
计算 
(1)(-3.6)+(+2.5)
(2)3-2×(-5)2
(3)−24×(−
5
6
+
3
8
1
12
)
(4)
1
2
+(−
2
3
)+
4
5
+(−
1
2
)+(−
1
3
)
(5)14−(
13
14
11
12
)×[4−(−2)2]
(6)5×(-6)-(-4)2÷(-8)
(7)-7.2-0.9-5.6+1.7
(8)(−1
3
5
)+(−3.2)+|−1.8|.
▼优质解答
答案和解析
(1)(-3.6)+(+2.5)=-1.1;

(2)3-2×(-5)2
=3-2×25
=3-50
=-47;

(3)−24×(−
5
6
+
3
8
1
12
)
=24×
5
6
-24×
3
8
+24×
1
12

=20-9+2
=13;

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

=0-1+
4
5

=-
1
5


(5)−14−(
13
14
11
12
)×[4−(−2)2]
=-1-(
13
14
-
11
12
)×[4-4]
=-1-(
13
14
-
11
12
)×0
=-1-0
=-1;

(6)5×(-6)-(-4)2÷(-8)
=-30-16÷(-8)
=-30+2
=-28;

(7)-7.2-0.9-5.6+1.7
=-13.7+1.7
=-12;

(8)(−1
3
5
)+(−3.2)+|−1.8|
=-1.6-3.2+1.8
=-4.8+1.8
=-3.