题目内容

直接写出得数．
1
8
+
4
8
=
8
9
-
1
9
=
4
6
-
3
6
=
1
4
+
1
4
+
1
4
=
1
2
+
1
2
=
5
6
-
1
6
=		1-
3
5
=		1-
1
8
-
3
8
=
3
10
+
7
10
=
13
14
+
1
14
=
2
25
+
1
25
=
3
16
+
4
16
+
8
16
=
1
8
+
4
8
=
5
8
8
9
-
1
9
=
7
9
4
6
-
3
6
=
1
6
1
4
+
1
4
+
1
4
=
3
4
1
2
+
1
2
=1
5
6
-
1
6
=
2
3
1-
3
5
=
2
5
1-
1
8
-
3
8
=
1
2
3
10
+
7
10
=1
13
14
+
1
14
=1
2
25
+
1
25
=
3
25
3
16
+
4
16
+
8
16
=
15
16
练习册系列答案
相关题目
直接写出得数．
2
10
+
7
10
=
5
8
-
3
8
=		1-
5
9
=
5
8
+
1
4
=
1
2
+
1
6
=
3
4
-
2
3
=
2
5
-
1
3
=
5
11
-
3
11
=
直接写出得数．
3-
2
7
=
1
3
+
2
7
=
7
8
+
5
8
=
7
9
-
5
6
+
2
9
=
3
4
-0.5
1
3
-
5
24
=		1-
3
5
+
2
5
=		2-
1
4
-0.75=
5
9
+
1
9
=		7-2
1
2
=		1
1
5
+0.8=		1.2-
3
5
=
1.7-
5
10
=		2.75+7
1
4
=		8.25-
2
4
=
5
9
-
1
3
=
5
8
-
2
8
=______
______个
1
8
减______个
1
8
，剩______个
1
8
，就是
()
()
．
计算
7
8
-
4
8
时，这样想：7个______减去4个______，剩下______个______，即______．
计算下面各题，能简算的要简算． 
1
2
+
1
5
-
1
4

3
4
-
1
8
+
7
12

2
9
+
4
5
+
7
9
+
1
5


2
3
+
1
3
-
5
6

3-
3
7
-
4
7

5
8
-(
5
8
-
1
2
)．
一块花布，第一次用去
3
8
米，比第二次少用了
2
8
米，第二次用去了多少米？
2
3
+
1
4
=
3
7
______．

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