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计算:(1)-72+47-13×(-2)(2)45-62×(112-518+736)(3)-12-[-6+(-12)÷6]2×(−34)3.

题目详情
计算:
(1)-72+47-13×(-2)
(2)45-62×(
1
12
-
5
18
+
7
36

(3)-12-[-6+(-12)÷6]2×(−
3
4
)3.


2
1
12
-
5
18
+
7
36

(3)-12-[-6+(-12)÷6]2×(−
3
4
)3.
1
12
111212
5
18
+
7
36

(3)-12-[-6+(-12)÷6]2×(−
3
4
)3.
5
18
551818
7
36

(3)-12-[-6+(-12)÷6]2×(−
3
4
)3.
7
36
773636
22(−
3
4
)3.
3
4
3344)3.)3.3.
▼优质解答
答案和解析
(1)原式=-72+47+26=-72+73=1;
(2)原式=45-36×(
1
12
-
5
18
+
7
36

=45-36×
1
12
+36×
5
18
-36×
7
36

=45-3+10-7
=55-10
=45;
(3)原式=-1-(-6-2)2×(-
3
4
3
=-1-64×(-
27
64

=-1+27
=26.
1
12
111121212-
5
18
+
7
36

=45-36×
1
12
+36×
5
18
-36×
7
36

=45-3+10-7
=55-10
=45;
(3)原式=-1-(-6-2)2×(-
3
4
3
=-1-64×(-
27
64

=-1+27
=26.
5
18
555181818+
7
36

=45-36×
1
12
+36×
5
18
-36×
7
36

=45-3+10-7
=55-10
=45;
(3)原式=-1-(-6-2)2×(-
3
4
3
=-1-64×(-
27
64

=-1+27
=26.
7
36
777363636)
=45-36×
1
12
+36×
5
18
-36×
7
36

=45-3+10-7
=55-10
=45;
(3)原式=-1-(-6-2)2×(-
3
4
3
=-1-64×(-
27
64

=-1+27
=26.
1
12
111121212+36×
5
18
-36×
7
36

=45-3+10-7
=55-10
=45;
(3)原式=-1-(-6-2)2×(-
3
4
3
=-1-64×(-
27
64

=-1+27
=26.
5
18
555181818-36×
7
36

=45-3+10-7
=55-10
=45;
(3)原式=-1-(-6-2)2×(-
3
4
3
=-1-64×(-
27
64

=-1+27
=26.
7
36
777363636
=45-3+10-7
=55-10
=45;
(3)原式=-1-(-6-2)22×(-
3
4
3
=-1-64×(-
27
64

=-1+27
=26.
3
4
333444)3
3
=-1-64×(-
27
64

=-1+27
=26.
27
64
272727646464)
=-1+27
=26.