题目内容

直接写得数．

23×20＝　　1000÷40＝　　320×20＝

答案：460;25;6400
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（2011?安平县）
直接写得数．
2
3
÷2=
1
5
+
1
7
=		 6.3÷0.01= 4-
7
8
-
1
8
=
7
10
÷
1
2
=		 390×0.02= 0.9-0.26= 4×
7
9
÷4×
7
9
=
直接写得数
1
3
+
2
3
=
7
8
+
3
8
=		 1-
9
11
=
5
12
-
1
6
=
5
6
-
1
6
=
3
4
-
1
2
=
9
20
+
3
20
+1=
1
7
+
2
7
+
3
7
=
1
5
+
1
3
=
2
5
+
3
10
=		 1-
5
12
-
7
12
=
3
11
+
9
11
-
1
11
=
直接写得数．
2
3
×3=		 6÷
3
4
=
3
7
÷1=
1÷
1
6
÷
1
6
=
1
2
÷
5
9
=		 0.5÷
1
6
=
1
3
-
1
6
=		 0÷
1
6
×
1
6
=
直接写得数
6×
2
3
=
4
15
×5=		 8÷
4
5
=
5
7
÷5=
4
5
×
5
8
=
1
4
÷
3
5
=
2
9
÷
2
7
=		 1÷
7
17
=
1
5
+
2
3
=
7
8
×
3
14
=
9
11
×0=
5
4
×8+8×
1
4
=
直接写得数
1
2
+
2
3
=		 0.8+4.2=
7
8
+3=
2
5
-
1
10
=		 1.2-
1
5
=
5
13
-
2
93
=
1-
5
19
=		 7.7+
3
10
=
12
5
-2=		 5-
9
16
=
1
100
-
1
1000
=
1
100
+
1
1000
=

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