题目内容

口算
1
5
+
3
5
=		1-
1
3
=
1
4
+
3
4
=
1
8
+
5
8
=
5
6
-
2
3
=
7
9
-
2
9
=
11
12
-
1
12
=
7
15
-
2
15
=
13
20
-
9
20
=
9
14
-
5
14
=
1
5
+
3
5
=
4
5
1-
1
3
=
2
3
1
4
+
3
4
=1
1
8
+
5
8
=
3
4
5
6
-
2
3
=
1
6
7
9
-
2
9
=
5
9
11
12
-
1
12
=
5
6
7
15
-
2
15
=
1
3
13
20
-
9
20
=
1
5
9
14
-
5
14
=
2
7
．
练习册系列答案
相关题目
计算．
2
9
+
7
9
+
5
12

1-
1
3
-
2
5

1
2
-
3
8
+
3
5
．
直接写出得数．
7
9
-
4
9
=
1
10
+
3
10
=
3
8
+
5
8
=
5
6
-
1
6
=
2
3
-
1
4
=
1
2
-
1
3
=		1-
2
7
=
1
2
+
1
6
=
a、b都是非0自然数，a＜b，用含有字母的式子计算下面各题．
1
a
+
1
b
=
1
a
-
1
b
=
直接写出得数．
14÷35=
1
2
+
3
7
=		0.77+0.33=
4
7
×4+4×
3
7
=
14-0.6=
7
8
×
2
7
=		5-1.4-1.6=2-
1
5
-
3
5
=
直接写出得数
1
8
+
3
8
=
1
4
-
1
5
=		0÷6
1
8
=		39×
3
13
=		15-
5
6
=
1÷
9
4
=		21÷
7
8
=		（
1
2
+
1
3
）×6=
9
11
×
1
2
÷
9
11
×
1
2
=		8×
7
8
-
7
8
=
直接写出得数
1
2
+
1
3
=
3
4
-
2
5
=		25×8=
1
15
×
5
6
=
10
9
×6×0=
7
11
÷14=
直接写出得数
1÷
1
50
=
5
7
+
2
7
=
3
5
÷
1
3
=
1
3
÷3=
3
5
×
1
3
=
1
4
-
1
6
=
7
8
÷7=
5
8
÷
2
3
=		4×
3
7
=
4
5
÷8=
3
8
×
2
3
=
5
7
÷
10
21
=
1
2
÷0.5=		5×
3
10
=
2
3
-
1
9
=
19
53
×0=		0.3×
5
6
=
3
5
÷
9
10
=
4
11
÷4=
1
4
+0.5=
一瓶可乐5升，喝了
1
2
升，还剩______升．

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