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计算下面各题,能简算的要简算,并写出主要的计算过程.①7.8-8.75+2.2-1.25②13.2÷(9.4-5)+5.32③7-37-47④1317-(517+110)⑤15+(56-1318)

题目详情
计算下面各题,能简算的要简算,并写出主要的计算过程.
①7.8-8.75+2.2-1.25           
②13.2÷(9.4-5)+5.32
③7-
3
7
-
4
7

13
17
-(
5
17
+
1
10
)       
1
5
+(
5
6
-
13
18



3
7
-
4
7

13
17
-(
5
17
+
1
10
)       
1
5
+(
5
6
-
13
18
3
7
3377
4
7

13
17
-(
5
17
+
1
10
)       
1
5
+(
5
6
-
13
18
4
7
4477
13
17
-(
5
17
+
1
10
)       
1
5
+(
5
6
-
13
18
13
17
13131717
5
17
+
1
10
)       
1
5
+(
5
6
-
13
18
5
17
551717
1
10
)       
1
5
+(
5
6
-
13
18
1
10
111010
1
5
+(
5
6
-
13
18
1
5
1155
5
6
-
13
18
5
6
5566
13
18
13
18
13131818
▼优质解答
答案和解析
①7.8-8.75+2.2-1.25
=(7.8+2.2)-(8.75+1.25)
=10-10
=0
②13.2÷(9.4-5)+5.32
=13.2÷4.4+5.32
=3+5.32
=8.32
③7-
3
7
-
4
7

=7-(
3
7
+
4
7

=7-1
=6
13
17
-(
5
17
+
1
10
)  
=
13
17
-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
3
7
333777-
4
7

=7-(
3
7
+
4
7

=7-1
=6
13
17
-(
5
17
+
1
10
)  
=
13
17
-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
4
7
444777
=7-(
3
7
+
4
7

=7-1
=6
13
17
-(
5
17
+
1
10
)  
=
13
17
-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
3
7
333777+
4
7

=7-1
=6
13
17
-(
5
17
+
1
10
)  
=
13
17
-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
4
7
444777)
=7-1
=6
13
17
-(
5
17
+
1
10
)  
=
13
17
-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
13
17
131313171717-(
5
17
+
1
10
)  
=
13
17
-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
5
17
555171717+
1
10
)  
=
13
17
-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
1
10
111101010)  
=
13
17
-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
13
17
131313171717-
5
17
-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
5
17
555171717-
1
10

=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
1
10
111101010
=
8
17
-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
8
17
888171717-
1
10

=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
1
10
111101010
=
63
170

1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
63
170
636363170170170
1
5
+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
1
5
111555+(
5
6
-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
5
6
555666-
13
18

=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
13
18
131313181818)
=
1
5
+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
1
5
111555+(
15
18
-
13
18

=
1
5
+
1
9

=
14
45
15
18
151515181818-
13
18

=
1
5
+
1
9

=
14
45
13
18
131313181818)
=
1
5
+
1
9

=
14
45
1
5
111555+
1
9

=
14
45
1
9
111999
=
14
45
14
45
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