题目内容

45 - 9→（   ）÷6→（   ）+15→（   ）÷7→（   ）×9→（   ）
36；6；21；3；18
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口算：
260+400= 640-400= 400÷5= 34×2= 4800÷8=
250万-70万= 640万-40万= 940万+60万= 4×500= 630÷3=
2+8×6= （54-45）÷9=
1
7
+
5
7
=		 1-
1
3
=
3
4
-
3
4
=
1-
6
9
=		 1-
3
15
=
3
6
+
1
6
+
2
6
=
（2011?建湖县模拟）列式计算．
（1）
2
3
与
3
5
的差除以
1
6
，商是多少？
（2）一个数比它的
4
5
多9，这个数是多少？（用方程解）
3
4
×2=
1
6
+
1
2
=
5
9
÷5=
1
12
×
6
7
=
3
4
÷3=
5
4
×
5
4
=
5
8
÷1=		 5-
2
3
=
3
9
×12=
3
5
×
5
12
=		 4-
2
3
=
7
12
×3=
2
7
÷14=		 8+
3
5
=		 0×
13
30
=		 39×
3
13
=
8×
1
2
=
5
6
÷
3
4
=		 4×
12
7
=		 20÷
4
5
=
1-
9
10
=		 2.5×16=
5
12
÷
1
6
=
3
2
×
4
5
=
8
15
÷24=		 11÷
22
8
=
1
2
÷
3
8
=
4
7
÷
2
3
=
3
4
+
1
7
=		 1.5÷0.05= 0×
1
9
×9=		 1.5÷0.05=
5
8
÷
7
12
=
4
5
×
2
3
×
5
6
=
5
9
×
2
5
=		 2.5×0.4=
14×
5
16
=		 (
1
2
+
1
3
)×12=
14
33
×
3
7
=		 0×
7
9
=
5
8
×
5
8
=
5
21
+
4
7
=
7
9
÷7=		 2-
1
4
=
3
5
-
1
8
=
4
21
÷
8
7
=
2
3
-
1
4
=		 6.25+1.75=
1
2
÷
7
18
=
9
10
×6=
1
8
+
1
9
=
3
4
÷
4
3
=
1
2
×
2
3
=		 12-
5
7
=		 1÷
2
5
=
2
9
÷18=
7
28
÷
2
9
=		 10×1×
2
5
=		 20÷
4
5
=
1
3
×9+9×
2
3
=
42÷
21
23
=
3
8
÷12=
脱式计算．
150÷25+72×3
1+0.45÷0.9-0.75
1-
7
12
×
3
8
÷
7
16

5
16
×[8.6÷（3.7+
3
5
）]．
口算小高手．
6×7=
 
     		45÷5=
 
    
9÷
 
=9    		 36÷4=
 
72÷8=
 
    		 18÷6=
 
    
54÷9=
 
 
×8=32．

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