题目内容

口算

34＋47＋69=

答案：150
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（2011?昆明模拟）
口算．
1
2
5
÷0.5=		 1
1
2
-1
1
2
÷1
1
2
=		 1.25×
3
4
×8=
4
7
×5.6=
1
5
÷5×
1
5
×5=		 4
1
2
×0×4
1
2
=		 120×（
1
15
+
1
12
）=
3
7
+0.29+
4
7
=
3
1
5
-
2
9
-
7
9
=		 （
3
4
-
2
5
）×20=
口算
1
4
×
1
3
=
4
7
÷2=
1
2
÷
1
2
=		 10÷
5
6
=
2
3
×
3
4
=
9
10
÷
1
5
=
1
6
÷6=
8
9
÷4=		 15×
4
5
=		 15÷
1
3
=
3
4
×
2
9
=
2
3
÷
1
2
=
2
5
×
1
2
=
1
2
÷
1
4
=
1
2
×
1
4
=
4
5
÷
1
5
=
3
7
×14=
1
4
÷
1
2
=
1
2
-
1
4
=
4
9
×
3
4
=
5
8
×
2
5
=
1
6
÷
2
3
=
1
2
+
1
4
=
3
5
÷1=
7
15
×5=		 1÷
3
4
=
1
2
÷
1
4
=		 1÷
3
5
=
3
4
×12=
1
5
÷
2
3
=
7
9
×
3
7
=		 1-
3
5
=		 18×
5
6
=		 7÷
7
5
=
1
3
+
1
6
=		 1+
3
5
=
2
9
×
1
4
=
8
3
÷2=
3
5
÷
2
5
=
5
9
÷3=
5
6
×
3
10
=
2
5
÷
1
2
=
8×
1
4
=		 9÷
3
4
=		 30×
1
3
=
4
5
÷2=
5
24
÷
5
6
=
5
8
×
1
2
×0=
1
3
×
3
11
=		 8÷
1
4
=
9
10
÷
3
5
=		 0÷
1
3
÷
1
2
=		 1×
9
11
=
2
5
÷
1
5
=
1
3
÷
1
3
=		 0×
2
9
÷
1
2
=
5
6
×
6
5
=
1
5
÷
1
3
=		 0÷
5
12
=		 1×
1
2
÷
1
2
=
口算
34+4=		 49-6= 98-80= 30+53=
27+29= 65-56= 80-79= 47-4=
56+44= 84-7= 53-3= 3l+5=

口算．

(1)47＋6＋8=

(2)81－5－7=

(3)34＋8－9=

(4)50－7＋8=

(5)64＋6－9=

口算．

(1)47＋6＋8=

(2)81－5－7=

(3)34＋8－9=

(4)50－7＋8=

(5)64＋6－9=

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