题目内容

口算

(1)47－6＝
(2)30＋34＝
(3)50－8＝
(4)14＋40＝
答案：41;64;42;54
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口算：
4
7
+
4
7
=		 1.52=
13
8
-
7
8
=		 1.8÷2.7=
1
5
-
1
6
=
1
8
+
1
12
=		 4+
1
9
=		 3-
7
10
=
5
6
-
1
16
=
3
10
-
3
100
=
15
16
-
1
4
-
1
8
=
3
8
+
1
3
+
5
8
=
口算
1÷
3
5
=		 0÷3
1
4
=
4
25
×
5
16
=		 2.6-
3
5
=
0.125×8×
3
7
=		 10×0.1%=
14×
4
7
÷4=		 （1+
2
7
）÷4=
（1+
2
7
）×
1
7
=		 99+1%=
口算．
4
7
+
2
3
=
99×
1
9
=
15
8
×
4
25
=
6-
3
5
-
2
5
=
1
4
×
2
3
×
1
5
=
4
15
×75=
23
24
×
8
69
=
1
6
×
4
7
=
5
16
×
18
15
=
1
3
×（1-
1
4
）=
口算
1-
7
9
÷
7
8
=		 0.24×0.5= 0.52+0.12= 1.25×8÷1.25×8=
3
5
×
2
3
×30=
3
8
+
5
8
-
5
8
+
3
8
=		 4-
3
7
-
4
7
=		 2÷5÷
4
5
×
2
3
=

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