题目内容

算一算．

15＋18＝□

答案：33
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算一算．
1
5
+
1
5
=
5
7
-
2
7
=
2
3
+
1
3
=
5
6
-
3
6
=
2
9
+
7
9
=		 1-
1
4
=
1-
3
7
=
6
8
-
3
8
=
1
4
+
2
4
=
算一算．
（2.1+5.6）÷O.7    
8.4÷2.4+15.3
7.8÷0.8×2.5      
38.5÷0.5+22.75．
．算一算．
1
3
+
3
8
=		 1-
2
5
=
11
6
-
2
9
=
7
4
+
1
7
=
5
7
-
1
5
=
2
9
+
1
2
=
算一算
2
5
+
1
5
=
3
5
3
5
3
4
-
1
4
=
1
2
1
2
 1-
5
7
=
2
7
2
7
3
10
+
3
10
+
3
10
=
9
10
9
10
5
5
-
2
5
-
1
5
=
2
5
2
5
260+402=
662
662
 185+415=
600
600
 529-329=
200
200
 800-346=
454
454
 402-72=
330
330
33×3=
99
99
 15×4=
60
60
 12×7=
84
84
 208×5=
1040
1040
 300×6=
1800
1800
．
算一算：
1
5
×3=
2
9
×5=
3
4
×8=
2
13
×26=
9
14
×7=
3
10
×5=
4
9
×12=
8
21
×3=
5
34
×34=
27
100
×200=
23
96
×0=
17
181
×1=

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