题目内容

3
4
+
4
3
等于（　　）
A．
7
7
B．
7
12
C．2
1
12

3
4
+
4
3
=
9
12
+
16
12
=
25
12
=2
1
12
．
故选：C．
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4
5
+
3
5
-1
11
17
+
3
17
+
2
17
7
15
+
4
15
-
2
15
5
18
-
1
18
+
14
18
1-
1
9
-
2
9
25
27
+
5
27
-
8
27
．
5
8
+
2
8
=
8
9
-
7
9
=		180×4=1-
7
9
=
4
5
-
2
5
=		25÷6=
3
4
+
1
4
=		1-
7
8
+
3
8
=
208×3=
4
5
-
1
5
=
3
8
+
5
8
-
2
8
=		150×7=
6
9
-
1
9
=		1-
1
9
-
2
9
=		21×5=420-190=
看谁算得快．
1
2
+
1
4
=
1
3
+
1
5
=
7
9
+
1
3
-
7
9
=
1-
7
12
-
5
12
=
1
7
+
6
7
=
1
3
-
1
5
=
1
4
+
1
7
+
3
4
=
9
8
+
1
9
-
9
8
=
算一算．直接写得数．
①
1
2
+
2
3
=		②
1
4
+
1
5
=		③
1
7
-
1
8
=		④
1
9
-
1
10
=
直接写出得数．
4
5
-
1
5
=
1-
7
8
=
2
5
-
1
10
=
2
3
+
2
5
=
1
7
+
3
4
=
7
8
-
3
4
=		1
2
5
+
3
5
=
1
16
+
1
4
=
1
4
-
3
9
=
5
8
-0.375=
直接写出得数
6÷
1
6
=		19÷
19
25
=
8
15
-
2
15
=
1
3
×
1
4
=
0.37+1.6=4.8÷0.8=1+8%=2.5÷1.25=
0÷
1
8
=
1
4
-
1
5
=
张大伯收了一批西瓜，第一天卖出了总数的
1
5
，第二天卖出了总数的
1
6
，两天共卖出总数的几分之几？
看图填空．

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