题目内容

直接写得数
5
8
-
5
12
=
19
24
÷38=
5
12
×
3
50
=
2
15
×4=
5
6
+
1
18
=
17
28
÷
51
56
=
5
3
÷
3
5
=
9
14
×
7
15
=
5
8
-
5
12
=
5
24
19
24
÷38=
1
48
5
12
×
3
50
=
1
40
2
15
×4=
8
15
5
6
+
1
18
=
8
9
17
28
÷
51
56
=
2
3
5
3
÷
3
5
=
25
9
9
14
×
7
15
=
3
10
练习册系列答案
相关题目
只列式或方程，不用计算．
（1）
11
18
减去
1
6
与
4
9
的和，差是多少？______
（2）一个数的2.5倍比12.72少2.8，这个数是多少？______．
1
5
+
3
5
=
3
8
-
1
8
=
4
9
+
3
9
=
2
3
+
1
3
=
3
5
-
1
5
=
3
8
+
1
8
=
2
3
-
1
3
=
3
7
-
3
7
=
1
6
+
5
6
=
4
9
-
3
9
=
3
7
+
3
7
=
3
4
-
1
4
=
直接写出得数：
3
8
+
5
8
=
2
7
+
4
7
=
4
5
+
1
5
=
1-
4
6
+
3
6
=
1
3
+
1
3
=
1-
4
9
=		1-
5
10
=
1
5
+
2
5
+
1
5
=
2
6
+
4
6
=
3
4
-
2
4
=
看谁算得又对又快
130×7=23+12=0.32+3.2=47×7÷47×7=
3
4
-
1
3
=
3
8
÷
5
8
=
1
3
÷
3
5
=
3
8
×
5
8
=
64÷0.4=
1
9
÷
8
9
×9=
5
7
-
5
7
×0=		12×（
2
3
+
1
4
）=
13
24
÷
1
6
=
2
3
：
3
4
=		0.1÷0.01=
1
3
×3÷3=
直接写出得数．
3
5
+
2
5
=
7
9
-
5
9
=
7
15
-
2
15
=
1
2
+
1
2
=
1-
3
7
=
1
12
+
5
12
=
1
5
-
1
5
=
4
5
-
2
5
=
6-
2
7
=
3
4
+
2
4
=
9
8
-1=		 2+
2
3
=
直接写得数
2
5
-
1
4
=
1
2
-
1
4
=
7
10
+
1
5
=		 1-
3
4
=
1
2
+
5
6
=
1
3
-
1
9
=
5
6
-
1
4
+
1
3
1
5
+
7
15
+
4
15
7
10
-(
3
4
-
2
5
)
13
15
-(
1
3
+
2
5
)		 1-
3
10
-
2
5
 
23
24
-
1
6
-
3
8
．
在计算1-
2
3
时，应把1写成______后再计算，计算结果是______．

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