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脱式计算25-38=27+421=56-34=1-12+13=45+34+710=521+(56-27)=23+34-56=23-(1112-23)
题目详情
脱式计算
-
=
+
=
-
= 1-
+
=
-
=
-
=
2 2 5 5
=
3 3 8 8
+
=
+
=
2 2 7 7
=
4 4 21 21
-
=
-
=
5 5 6 6
=
3 3 4 4 1-
+
=
+
=
1 1 2 2
=
1 1 3 3
+
+
=
+(
-
)=
+
-
=
-(
-
)
+
+
=
+
+
=
4 4 5 5
+
=
3 3 4 4
=
7 7 10 10
+(
-
)=
+(
-
)=
5 5 21 21
-
)=
5 5 6 6
)=
2 2 7 7
+
-
=
+
-
=
2 2 3 3
-
=
3 3 4 4
=
5 5 6 6
-(
-
)
-(
-
)
2 2 3 3
-
)
11 11 12 12
)
2 2 3 3
|
|
| 1-
| ||||||||||||||||||||||||
|
|
|
|
|
|
| 1-
| ||||||||||||||||||||||||
|
|
|
|
2 |
5 |
3 |
8 |
2 |
7 |
4 |
21 |
5 |
6 |
3 |
4 |
1 |
2 |
1 |
3 |
2 |
5 |
3 |
8 |
2 |
5 |
3 |
8 |
2 |
5 |
3 |
8 |
3 |
8 |
2 |
7 |
4 |
21 |
2 |
7 |
4 |
21 |
2 |
7 |
4 |
21 |
4 |
21 |
5 |
6 |
3 |
4 |
5 |
6 |
3 |
4 |
5 |
6 |
3 |
4 |
3 |
4 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
3 |
4 |
5 |
3 |
4 |
7 |
10 |
5 |
21 |
5 |
6 |
2 |
7 |
2 |
3 |
3 |
4 |
5 |
6 |
2 |
3 |
11 |
12 |
2 |
3 |
4 |
5 |
3 |
4 |
7 |
10 |
4 |
5 |
3 |
4 |
7 |
10 |
4 |
5 |
3 |
4 |
7 |
10 |
3 |
4 |
7 |
10 |
7 |
10 |
5 |
21 |
5 |
6 |
2 |
7 |
5 |
21 |
5 |
6 |
2 |
7 |
5 |
21 |
5 |
6 |
2 |
7 |
5 |
6 |
2 |
7 |
2 |
7 |
2 |
3 |
3 |
4 |
5 |
6 |
2 |
3 |
3 |
4 |
5 |
6 |
2 |
3 |
3 |
4 |
5 |
6 |
3 |
4 |
5 |
6 |
5 |
6 |
2 |
3 |
11 |
12 |
2 |
3 |
2 |
3 |
11 |
12 |
2 |
3 |
2 |
3 |
11 |
12 |
2 |
3 |
11 |
12 |
2 |
3 |
2 |
3 |
▼优质解答
答案和解析
(1)
-
=
-
=
;
(2)
+
=
+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
2 2 25 5 5-
=
-
=
;
(2)
+
=
+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
3 3 38 8 8
=
-
=
;
(2)
+
=
+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
16 16 1640 40 40-
=
;
(2)
+
=
+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
15 15 1540 40 40
=
;
(2)
+
=
+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
1 1 140 40 40;
(2)
+
=
+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
2 2 27 7 7+
=
+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
4 4 421 21 21
=
+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
6 6 621 21 21+
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
4 4 421 21 21
=
;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
10 10 1021 21 21;
(3)
-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
5 5 56 6 6-
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
3 3 34 4 4
=
-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
10 10 1012 12 12-
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
9 9 912 12 12
=
;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
1 1 112 12 12;
(4)1-
+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
1 1 12 2 2+
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
1 1 13 3 3
=
+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
1 1 12 2 2+
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
1 1 13 3 3
=
;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
5 5 56 6 6;
(5)
+
+
=
+
=
;
(6)
+(
-
)
=
+
4 4 45 5 5+
+
=
+
=
;
(6)
+(
-
)
=
+
3 3 34 4 4+
=
+
=
;
(6)
+(
-
)
=
+
7 7 710 10 10
=
+
=
;
(6)
+(
-
)
=
+
31 31 3120 20 20+
=
;
(6)
+(
-
)
=
+
7 7 710 10 10
=
;
(6)
+(
-
)
=
+
9 9 94 4 4;
(6)
+(
-
)
=
+
5 5 521 21 21+(
-
)
=
+
5 5 56 6 6-
)
=
+
2 2 27 7 7)
=
+
5 5 521 21 21+
举报
问题解析 问题解析
(1)先通分,再计算;
(2)先通分,再计算;
(3)先通分,再计算;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)先算减法,再算加法;
(7)按照从左向右的顺序进行计算;
(8)根据减法的性质进行简算. (1)先通分,再计算;
(2)先通分,再计算;
(3)先通分,再计算;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)先算减法,再算加法;
(7)按照从左向右的顺序进行计算;
(8)根据减法的性质进行简算.名师点评 名师点评
本题考点: 本题考点:
分数的加法和减法. 分数的加法和减法.
考点点评: 考点点评:
考查了分数四则混合运算,注意运算顺序和运算法则,然后再进一步计算. 考查了分数四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
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2 |
5 |
3 |
8 |
=
16 |
40 |
15 |
40 |
=
1 |
40 |
(2)
2 |
7 |
4 |
21 |
=
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
2 |
5 |
3 |
8 |
=
16 |
40 |
15 |
40 |
=
1 |
40 |
(2)
2 |
7 |
4 |
21 |
=
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
3 |
8 |
=
16 |
40 |
15 |
40 |
=
1 |
40 |
(2)
2 |
7 |
4 |
21 |
=
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
16 |
40 |
15 |
40 |
=
1 |
40 |
(2)
2 |
7 |
4 |
21 |
=
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
15 |
40 |
=
1 |
40 |
(2)
2 |
7 |
4 |
21 |
=
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
1 |
40 |
(2)
2 |
7 |
4 |
21 |
=
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
2 |
7 |
4 |
21 |
=
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
4 |
21 |
=
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
6 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
4 |
21 |
=
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
10 |
21 |
(3)
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
5 |
6 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
3 |
4 |
=
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
10 |
12 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
9 |
12 |
=
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
1 |
12 |
(4)1-
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
1 |
2 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
1 |
3 |
=
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
1 |
2 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
1 |
3 |
=
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
5 |
6 |
(5)
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
4 |
5 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
3 |
4 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
7 |
10 |
=
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
31 |
20 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
7 |
10 |
=
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
9 |
4 |
(6)
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
5 |
6 |
2 |
7 |
=
5 |
21 |
2 |
7 |
=
5 |
21 |
5 |
21 |
作业帮用户
2017-11-13
举报
作业帮用户作业帮用户
2017-11-132017-11-13
举报



- 问题解析
- (1)先通分,再计算;
(2)先通分,再计算;
(3)先通分,再计算;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)先算减法,再算加法;
(7)按照从左向右的顺序进行计算;
(8)根据减法的性质进行简算.
(2)先通分,再计算;
(3)先通分,再计算;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)先算减法,再算加法;
(7)按照从左向右的顺序进行计算;
(8)根据减法的性质进行简算.
(2)先通分,再计算;
(3)先通分,再计算;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)先算减法,再算加法;
(7)按照从左向右的顺序进行计算;
(8)根据减法的性质进行简算.
- 名师点评
-
- 本题考点:
- 分数的加法和减法.
-
- 考点点评:
- 考查了分数四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
- 本题考点:
- 分数的加法和减法.
- 本题考点:
- 分数的加法和减法.
- 考点点评:
- 考查了分数四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
- 考点点评:
- 考查了分数四则混合运算,注意运算顺序和运算法则,然后再进一步计算.






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