分数加减法练习题计算题
巡山小妖精
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2021年01月22日 07:35
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一、口算。结果请用最简分数表示。
1
1
1
1
2
1
4
1
7
3
+
=
-
=
-
=
-
=
-
=
2
3
2
4
5
5
7
7
8
8
1
2
5
2
1
1
3
1
2
1
+
=
-
=
+
=
-
=
+
=
10
5
6
3
3
5
8
4
3
3
5
5
9
1
4
2
1
1
1
1
-
=
-
=
-
=
+
=
-
=
12
12
10
10
5
5< br>6
3
2
8
3
3
1
1
4
3< br>7
5
5
+
=
-
=
+
=
1
-
=
+
=
8
8
2
5
7
7
8
6
6
5
3
1
9
3
5
5
3
5
1
-
=
+
=
-
=
-
=
+
=
12
5
2
10
10
77
8
8
1
7
1
3
3
1
91
9
3
+
=
+
=
+
=
-
=
-
=
6
12
4
4
7
2
10
2
10
5
5
8
1
7
19
13
19
3
+
=
+
=
-
=
+
9
9
8
8
2 4
24
36
36
=
3
4
11
1
1
1
12
3
+
=
-
=
-
=
-
7
7
8
8
4
9
1 3
13
=
8
4
1
1
1
3
1
1
7
3
3
+
+
=
1
-
-
=
+
+
=
-
+
9
11
9
6
6
4
4
4
8
8
8
=
+
-
=
=
-
=
+
=
+
=
-
=
二、计算(能简算的要简算)
。
5
3
1
1
5
3
1
1
(
1
)
8
-
10
+
4
(
2
)
1
-
24
+
48
(
3
)
4
+
2
5
-
1
2
3
2
1
5
4
2
2
3
3
2
(
4
)
5
5
-
2
3
+
3
6
(
5
)
7
-
15
+
7
-
15
(
6
)
4
-﹙
4
-
3
﹚
1
7
3
3
4
1
1
(
7
)
2
-
8
-
8
(
8
)+
5
8
-
3
4
(
9
)
5
-
4
+
3
9
3
3
7
3
27
13
5
(
10
)
10
+
20
-
15
(
11
)
1
-
12
+
4
(
12
)
28
+﹙
14
-
7
﹚
5
2
7
1
1
5
5
1
1
(
13
)
2
6
-﹙
3
+
12
)
(
14
)
15
4
-
5
2
+
7
6
(
15
)
1
6
-﹙
3
3
-
1
2
﹚
1
2
7
5
3
1
2
(
16
)+
3
(
17
)
+
+
(
18
)
+
-
8
15
8
6
4
3