题目内容

口算我最棒!
9
10
÷3=
4
5
-
2
3
=		8÷
4
5
=
3
4
×8=		30×50%=
0.25×29×4=6÷120%=1-97%=
9
10
÷3=
3
10
，
4
5
-
2
3
=
2
15
，		8÷
4
5
=10，
3
4
×8=6，		30×50%=15，
0.25×29×4=29，6÷120%=5，1-97%=0.03．
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相关题目
直接写得数．
3
4
-
2
3
=
6
7
×
7
9
=
5
11
×44=
11
12
÷22=		4.5×10%=
4
3
÷
2
3
=
5
8
÷
5
12
=
7
4
-1.25=		1.5+
3
2
=
1
4
X-
1
6
X=
口算下面各题．
1
9
+
4
9
=
7
8
-
2
8
=
3
6
+
2
6
=
5
7
-
2
7
=		6.4+2.3=7.3-0.4=
1.1+2.8=707÷7=360÷3=93÷3=40×25=720÷4=
80-25=36×0=
直接写得数：
4
9
+
1
9
=		1-
1
3
=
5
8
+
3
8
=
4
5
-
3
5
=
289×6≈503×8≈200×8=40×5=

②再涂几块才会是一半？
1个
1
4
加上2个
1
4
是3个
1
4
，就是
3
4
．______．
口算
2
5
+
1
5
=
7
9
-
2
9
=
10
17
+______=
15
17
6
7
-
3
7
=
1-
11
15
=		______-
14
19
=
3
19
．
1
4
+
2
4
=		1-
1
8
=
3
8
+
5
8
=
9
10
-
3
10
=
7
9
-
4
9
=		1-
5
7
=
5
6
+
1
6
=
3
5
-
2
5
=
直接写得数．
5
6
-
2
6
=
1
3
+
1
4
=
4
5
+
7
10
=
3
16
+
3
8
=
8
9
-
1
7
=
3
3
-
4
4
=
1
7
-
1
8
=
2
5
+
3
5
=
1-
2
3
=
5
8
-
7
12
=．

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