题目内容

口算．
5
6
-
1
3
=		0.375×
3
4
=		3.14×40=
1
8
÷
3
4
=
0.24÷0.8=1.1-0.11=3.2+0.85=
1
3
÷3-
1
9
=
5
6
-
1
3
=
1
2
0.375×
3
4
=
9
32
3.14×40=125.6
1
8
÷
3
4
=
1
6
0.24÷0.8=0.31.1-0.11=0.993.2+0.85=4.05
1
3
÷3-
1
9
=0
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口算．
1
3
-
1
4
=		42÷10%=1-0.5=48×12.5%=
9×
1
9
÷9×
1
9
=		（
1
4
-
1
5
）×20=		7.2÷0.08=5÷
5
7
-
5
7
÷5=
计算：
4
5
-
1
3
=
18×
5
6
=
3
16
×
4
9
=
5
8
÷
2
3
=
3
4
×12=
2
3
÷2=
1
3
+
1
2
=
1
2
-
1
5
=
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
=
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
=
用一根竹竿测量井深，水深2
5
8
米，水面到井口有1
5
8
米，露出井口有
1
3
米．这根竹竿有多少米？
在计算1-
2
3
时，应把1写成______后再计算，计算结果是______．
小红和小强给街心花园里的所有小树浇水，小红浇了
3
9
，小强浇了几分之几？

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